CVE-2026-20346 (GCVE-0-2026-20346)
Vulnerability from cvelistv5
Published
2026-08-07 16:42
Modified
2026-08-07 18:12
CWE
Summary
A vulnerability in the PDF file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in PDF files during scanning, which may result in an out-of-bounds buffer read. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.
Impacted products
Vendor Product Version
Cisco Cisco Secure Endpoint Version: 7.0.5
Version: 6.2.19
Version: 7.3.3
Version: 7.2.13
Version: 6.1.5
Version: 6.3.1
Version: 6.2.5
Version: 7.3.5
Version: 6.2.1
Version: 7.2.7
Version: 7.1.1
Version: 6.3.5
Version: 6.2.9
Version: 7.3.1
Version: 6.1.7
Version: 7.2.11
Version: 7.2.3
Version: 7.1.5
Version: 6.3.3
Version: 7.3.9
Version: 6.2.3
Version: 6.1.9
Version: 6.0.9
Version: 7.2.5
Version: 6.0.7
Version: 6.3.7
Version: 1.12.3
Version: 1.8.0
Version: 1.11.1
Version: 1.12.4
Version: 1.10.0
Version: 1.12.0
Version: 1.8.1
Version: 1.10.1
Version: 1.12.1
Version: 1.12.6
Version: 1.14.0
Version: 1.10.2
Version: 1.12.7
Version: 1.12.2
Version: 1.6.0
Version: 1.9.0
Version: 1.11.0
Version: 1.7.0
Version: 1.13.0
Version: 1.8.4
Version: 1.13.1
Version: 1.9.1
Version: 1.12.5
Version: 1.13.2
Version: 2.0.2
Version: 1.1.0
Version: 2.0.0
Version: 2.0.1
Version: 8.1.7.21512
Version: 8.1.7
Version: 8.1.5
Version: 8.1.3.21242
Version: 8.1.3
Version: 8.1.5.21322
Version: 8.1.7.21417
Version: 2.1.0.14
Version: 2.2.0
Version: 2.3.0
Version: 2.4.0
Version: 2.5.0
Version: 2.6.0
Version: 2.7.0
Version: 2.8.0
Version: 2.9.0
Version: 2.10.0
Version: 2.10.1
Version: 2.11.0
Version: 1.14.1
Version: 1.15.1
Version: 1.15.2
Version: 1.15.3
Version: 1.15.4
Version: 1.15.5
Version: 1.15.6
Version: 1.16.0
Version: 1.16.1
Version: 1.16.2
Version: 1.16.3
Version: 1.18.0
Version: 1.18.1
Version: 1.20.0
Version: 1.21.0
Version: 1.21.1
Version: 1.21.2
Version: 1.21.3
Version: 1.22.0
Version: 1.22.1
Version: 1.22.2
Version: 1.22.3
Version: 1.22.4
Version: 1.24.0
Version: 1.24.1
Version: 1.24.2
Version: 1.24.3
Version: 1.24.4
Version: 1.26.0
Version: 1.24.5
Version: 1.26.1
Version: 1.27.0
Version: 1.15.0
Version: 1.17.0
Version: 1.17.1
Version: 1.17.2
Version: 1.19.0
Version: 1.20.1
Version: 1.20.2
Version: 1.20.3
Version: 1.20.4
Version: 1.20.5
Version: 1.20.6
Version: 1.23.0
Version: 1.23.1
Version: 1.20.7
Version: 1.20.8
Version: 1.25.0
Version: 1.25.1
Version: 1.25.2
Version: 1.27.1
Version: 1.27.2
Version: 7.3.13
Version: 7.3.15
Version: 7.4.1
Version: 7.4.1.20425
Version: 7.4.1.20439
Version: 7.4.3
Version: 7.4.3.20679
Version: 7.4.5
Version: 7.5.1.20813
Version: 7.5.1.20833
Version: 7.5.3
Version: 7.5.5
Version: 8.0.1.21160
Version: 8.0.1.21164
Version: 7.5.7
Version: 7.5.9
Version: 7.5.11
Version: 8.1.7.21585
Version: 7.5.13.21586
Version: 7.5.13.21598
Version: 8.2.1.21612
Version: 8.2.1.21650
Version: 7.5.15.21611
Version: 7.5.17.21680
Version: 8.2.3.30119
Version: 8.2.4.30130
Version: 8.4.0
Version: 7.5.19
Version: 8.4.1.30298
Version: 8.4.2.30317
Version: 8.4.1.30307
Version: 7.5.20
Version: 8.4.3
Version: 8.4.4.30419
Version: 8.4.4.30467
Version: 7.5.21.21732
Version: 8.4.5.30483
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the PDF file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of\u0026nbsp;memory corruption on an affected device.\r\n\r\nThis vulnerability is due to improper boundary checks for content in PDF files during scanning, which may result in an out-of-bounds buffer read. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerabilities that are described in CVE-2026-20337 and CVE-2026-20338.\r\n\r\nThe Cisco PSIRT is not aware of proof-of-concept exploit code for any of the other vulnerabilities that are described in this advisory.\r\nThe Cisco PSIRT is not aware of any malicious use of the vulnerabilities that are described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "cvssV3_1"
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      "problemTypes": [
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          "descriptions": [
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        "shortName": "cisco"
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      "references": [
        {
          "name": "cisco-sa-clamav-WuuvVd26",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26"
        }
      ],
      "source": {
        "advisory": "cisco-sa-clamav-WuuvVd26",
        "defects": [
          "CSCwv55055"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "ClamAV PDF File Format Processing Memory Corruption Vulnerability"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20346",
    "datePublished": "2026-08-07T16:42:07.628Z",
    "dateReserved": "2025-10-08T11:59:15.413Z",
    "dateUpdated": "2026-08-07T18:12:29.718Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-20346\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-07T18:12:21.976408Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-07T18:12:26.382Z\"}}], \"cna\": {\"title\": \"ClamAV PDF File Format Processing Memory Corruption Vulnerability\", \"source\": {\"defects\": [\"CSCwv55055\"], \"advisory\": \"cisco-sa-clamav-WuuvVd26\", \"discovery\": \"EXTERNAL\"}, \"metrics\": [{\"format\": \"cvssV3_1\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco Secure Endpoint\", \"versions\": [{\"status\": \"affected\", \"version\": \"7.0.5\"}, {\"status\": \"affected\", \"version\": \"6.2.19\"}, {\"status\": \"affected\", \"version\": \"7.3.3\"}, {\"status\": \"affected\", \"version\": \"7.2.13\"}, {\"status\": \"affected\", \"version\": \"6.1.5\"}, {\"status\": \"affected\", \"version\": \"6.3.1\"}, {\"status\": \"affected\", \"version\": \"6.2.5\"}, {\"status\": \"affected\", \"version\": \"7.3.5\"}, {\"status\": \"affected\", \"version\": \"6.2.1\"}, {\"status\": \"affected\", \"version\": \"7.2.7\"}, {\"status\": \"affected\", \"version\": \"7.1.1\"}, {\"status\": \"affected\", \"version\": \"6.3.5\"}, {\"status\": \"affected\", \"version\": \"6.2.9\"}, {\"status\": \"affected\", 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\"version\": \"1.8.1\"}, {\"status\": \"affected\", \"version\": \"1.10.1\"}, {\"status\": \"affected\", \"version\": \"1.12.1\"}, {\"status\": \"affected\", \"version\": \"1.12.6\"}, {\"status\": \"affected\", \"version\": \"1.14.0\"}, {\"status\": \"affected\", \"version\": \"1.10.2\"}, {\"status\": \"affected\", \"version\": \"1.12.7\"}, {\"status\": \"affected\", \"version\": \"1.12.2\"}, {\"status\": \"affected\", \"version\": \"1.6.0\"}, {\"status\": \"affected\", \"version\": \"1.9.0\"}, {\"status\": \"affected\", \"version\": \"1.11.0\"}, {\"status\": \"affected\", \"version\": \"1.7.0\"}, {\"status\": \"affected\", \"version\": \"1.13.0\"}, {\"status\": \"affected\", \"version\": \"1.8.4\"}, {\"status\": \"affected\", \"version\": \"1.13.1\"}, {\"status\": \"affected\", \"version\": \"1.9.1\"}, {\"status\": \"affected\", \"version\": \"1.12.5\"}, {\"status\": \"affected\", \"version\": \"1.13.2\"}, {\"status\": \"affected\", \"version\": \"2.0.2\"}, {\"status\": \"affected\", \"version\": \"1.1.0\"}, {\"status\": \"affected\", \"version\": \"2.0.0\"}, {\"status\": \"affected\", \"version\": \"2.0.1\"}, {\"status\": \"affected\", \"version\": \"8.1.7.21512\"}, {\"status\": \"affected\", \"version\": \"8.1.7\"}, {\"status\": \"affected\", \"version\": \"8.1.5\"}, {\"status\": \"affected\", \"version\": \"8.1.3.21242\"}, {\"status\": \"affected\", \"version\": \"8.1.3\"}, {\"status\": \"affected\", \"version\": \"8.1.5.21322\"}, {\"status\": \"affected\", \"version\": \"8.1.7.21417\"}, {\"status\": \"affected\", \"version\": \"2.1.0.14\"}, {\"status\": \"affected\", \"version\": \"2.2.0\"}, {\"status\": \"affected\", \"version\": \"2.3.0\"}, {\"status\": \"affected\", \"version\": \"2.4.0\"}, {\"status\": \"affected\", \"version\": \"2.5.0\"}, {\"status\": \"affected\", \"version\": \"2.6.0\"}, {\"status\": \"affected\", \"version\": \"2.7.0\"}, {\"status\": \"affected\", \"version\": \"2.8.0\"}, {\"status\": \"affected\", \"version\": \"2.9.0\"}, {\"status\": \"affected\", \"version\": \"2.10.0\"}, {\"status\": \"affected\", \"version\": \"2.10.1\"}, {\"status\": \"affected\", \"version\": \"2.11.0\"}, {\"status\": \"affected\", \"version\": \"1.14.1\"}, {\"status\": \"affected\", \"version\": \"1.15.1\"}, {\"status\": \"affected\", \"version\": \"1.15.2\"}, {\"status\": \"affected\", \"version\": \"1.15.3\"}, {\"status\": \"affected\", \"version\": \"1.15.4\"}, {\"status\": \"affected\", \"version\": \"1.15.5\"}, {\"status\": \"affected\", \"version\": \"1.15.6\"}, {\"status\": \"affected\", \"version\": \"1.16.0\"}, {\"status\": \"affected\", \"version\": \"1.16.1\"}, {\"status\": \"affected\", \"version\": \"1.16.2\"}, {\"status\": \"affected\", \"version\": \"1.16.3\"}, {\"status\": \"affected\", \"version\": \"1.18.0\"}, {\"status\": \"affected\", \"version\": \"1.18.1\"}, {\"status\": \"affected\", \"version\": \"1.20.0\"}, {\"status\": \"affected\", \"version\": \"1.21.0\"}, {\"status\": \"affected\", \"version\": \"1.21.1\"}, {\"status\": \"affected\", \"version\": \"1.21.2\"}, {\"status\": \"affected\", \"version\": \"1.21.3\"}, {\"status\": \"affected\", \"version\": \"1.22.0\"}, {\"status\": \"affected\", \"version\": \"1.22.1\"}, {\"status\": \"affected\", \"version\": \"1.22.2\"}, {\"status\": \"affected\", \"version\": \"1.22.3\"}, {\"status\": \"affected\", \"version\": \"1.22.4\"}, {\"status\": \"affected\", \"version\": \"1.24.0\"}, {\"status\": \"affected\", \"version\": \"1.24.1\"}, {\"status\": \"affected\", \"version\": \"1.24.2\"}, {\"status\": \"affected\", \"version\": \"1.24.3\"}, {\"status\": \"affected\", \"version\": \"1.24.4\"}, {\"status\": \"affected\", \"version\": \"1.26.0\"}, {\"status\": \"affected\", \"version\": \"1.24.5\"}, {\"status\": \"affected\", \"version\": \"1.26.1\"}, {\"status\": \"affected\", \"version\": \"1.27.0\"}, {\"status\": \"affected\", \"version\": \"1.15.0\"}, {\"status\": \"affected\", \"version\": \"1.17.0\"}, {\"status\": \"affected\", \"version\": \"1.17.1\"}, {\"status\": \"affected\", \"version\": \"1.17.2\"}, {\"status\": \"affected\", \"version\": \"1.19.0\"}, {\"status\": \"affected\", \"version\": \"1.20.1\"}, {\"status\": \"affected\", \"version\": \"1.20.2\"}, {\"status\": \"affected\", \"version\": \"1.20.3\"}, {\"status\": \"affected\", \"version\": \"1.20.4\"}, {\"status\": \"affected\", \"version\": \"1.20.5\"}, {\"status\": \"affected\", \"version\": \"1.20.6\"}, {\"status\": \"affected\", \"version\": \"1.23.0\"}, {\"status\": \"affected\", \"version\": \"1.23.1\"}, {\"status\": \"affected\", \"version\": \"1.20.7\"}, {\"status\": \"affected\", \"version\": \"1.20.8\"}, {\"status\": \"affected\", \"version\": \"1.25.0\"}, {\"status\": \"affected\", \"version\": \"1.25.1\"}, {\"status\": \"affected\", \"version\": \"1.25.2\"}, {\"status\": \"affected\", \"version\": \"1.27.1\"}, {\"status\": \"affected\", \"version\": \"1.27.2\"}, {\"status\": \"affected\", \"version\": \"7.3.13\"}, {\"status\": \"affected\", \"version\": \"7.3.15\"}, {\"status\": \"affected\", \"version\": \"7.4.1\"}, {\"status\": \"affected\", \"version\": \"7.4.1.20425\"}, {\"status\": \"affected\", \"version\": \"7.4.1.20439\"}, {\"status\": \"affected\", \"version\": \"7.4.3\"}, {\"status\": \"affected\", \"version\": \"7.4.3.20679\"}, {\"status\": \"affected\", \"version\": \"7.4.5\"}, {\"status\": \"affected\", \"version\": \"7.5.1.20813\"}, {\"status\": \"affected\", \"version\": \"7.5.1.20833\"}, {\"status\": \"affected\", \"version\": \"7.5.3\"}, {\"status\": \"affected\", \"version\": \"7.5.5\"}, {\"status\": \"affected\", \"version\": \"8.0.1.21160\"}, {\"status\": \"affected\", \"version\": \"8.0.1.21164\"}, {\"status\": \"affected\", \"version\": \"7.5.7\"}, {\"status\": \"affected\", \"version\": \"7.5.9\"}, {\"status\": \"affected\", \"version\": \"7.5.11\"}, {\"status\": \"affected\", \"version\": \"8.1.7.21585\"}, {\"status\": \"affected\", \"version\": \"7.5.13.21586\"}, {\"status\": \"affected\", \"version\": \"7.5.13.21598\"}, {\"status\": \"affected\", \"version\": \"8.2.1.21612\"}, {\"status\": \"affected\", \"version\": \"8.2.1.21650\"}, {\"status\": \"affected\", \"version\": \"7.5.15.21611\"}, {\"status\": \"affected\", \"version\": \"7.5.17.21680\"}, {\"status\": \"affected\", \"version\": \"8.2.3.30119\"}, {\"status\": \"affected\", \"version\": \"8.2.4.30130\"}, {\"status\": \"affected\", \"version\": \"8.4.0\"}, {\"status\": \"affected\", \"version\": \"7.5.19\"}, {\"status\": \"affected\", \"version\": \"8.4.1.30298\"}, {\"status\": \"affected\", \"version\": \"8.4.2.30317\"}, {\"status\": \"affected\", \"version\": \"8.4.1.30307\"}, {\"status\": \"affected\", \"version\": \"7.5.20\"}, {\"status\": \"affected\", \"version\": \"8.4.3\"}, {\"status\": \"affected\", \"version\": \"8.4.4.30419\"}, {\"status\": \"affected\", \"version\": \"8.4.4.30467\"}, {\"status\": \"affected\", \"version\": \"7.5.21.21732\"}, {\"status\": \"affected\", \"version\": \"8.4.5.30483\"}], \"defaultStatus\": \"unknown\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerabilities that are described in CVE-2026-20337 and CVE-2026-20338.\\r\\n\\r\\nThe Cisco PSIRT is not aware of proof-of-concept exploit code for any of the other vulnerabilities that are described in this advisory.\\r\\nThe Cisco PSIRT is not aware of any malicious use of the vulnerabilities that are described in this advisory.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26\", \"name\": \"cisco-sa-clamav-WuuvVd26\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the PDF file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of\u0026nbsp;memory corruption on an affected device.\\r\\n\\r\\nThis vulnerability is due to improper boundary checks for content in PDF files during scanning, which may result in an out-of-bounds buffer read. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-125\", \"description\": \"Out-of-bounds Read\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-08-07T16:42:07.628Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-20346\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-07T18:12:29.718Z\", \"dateReserved\": \"2025-10-08T11:59:15.413Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-08-07T16:42:07.628Z\", \"assignerShortName\": \"cisco\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


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