CVE-2026-20346 (GCVE-0-2026-20346)
Vulnerability from cvelistv5
Published
2026-08-07 16:42
Modified
2026-08-07 18:12
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-125 - Out-of-bounds Read
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.
References
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": [
{
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"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."
}
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"title": "ClamAV PDF File Format Processing Memory Corruption Vulnerability"
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"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\", \"version\": \"7.3.1\"}, {\"status\": \"affected\", \"version\": \"6.1.7\"}, {\"status\": \"affected\", \"version\": \"7.2.11\"}, {\"status\": \"affected\", \"version\": \"7.2.3\"}, {\"status\": \"affected\", \"version\": \"7.1.5\"}, {\"status\": \"affected\", \"version\": \"6.3.3\"}, {\"status\": \"affected\", \"version\": \"7.3.9\"}, {\"status\": \"affected\", \"version\": \"6.2.3\"}, {\"status\": \"affected\", \"version\": \"6.1.9\"}, {\"status\": \"affected\", \"version\": \"6.0.9\"}, {\"status\": \"affected\", \"version\": \"7.2.5\"}, {\"status\": \"affected\", \"version\": \"6.0.7\"}, {\"status\": \"affected\", \"version\": \"6.3.7\"}, {\"status\": \"affected\", \"version\": \"1.12.3\"}, {\"status\": \"affected\", \"version\": \"1.8.0\"}, {\"status\": \"affected\", \"version\": \"1.11.1\"}, {\"status\": \"affected\", \"version\": \"1.12.4\"}, {\"status\": \"affected\", \"version\": \"1.10.0\"}, {\"status\": \"affected\", \"version\": \"1.12.0\"}, {\"status\": \"affected\", \"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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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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