CVE-2026-2967 (GCVE-0-2026-2967)
Vulnerability from cvelistv5
Published
2026-02-23 02:32
Modified
2026-02-23 13:32
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Summary
A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cesanta | Mongoose |
Version: 7.0 Version: 7.1 Version: 7.2 Version: 7.3 Version: 7.4 Version: 7.5 Version: 7.6 Version: 7.7 Version: 7.8 Version: 7.9 Version: 7.10 Version: 7.11 Version: 7.12 Version: 7.13 Version: 7.14 Version: 7.15 Version: 7.16 Version: 7.17 Version: 7.18 Version: 7.19 Version: 7.20 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-2967",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-23T13:32:47.660229Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-23T13:32:57.830Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*"
],
"modules": [
"TCP Sequence Number Handler"
],
"product": "Mongoose",
"vendor": "Cesanta",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
"status": "affected",
"version": "7.1"
},
{
"status": "affected",
"version": "7.2"
},
{
"status": "affected",
"version": "7.3"
},
{
"status": "affected",
"version": "7.4"
},
{
"status": "affected",
"version": "7.5"
},
{
"status": "affected",
"version": "7.6"
},
{
"status": "affected",
"version": "7.7"
},
{
"status": "affected",
"version": "7.8"
},
{
"status": "affected",
"version": "7.9"
},
{
"status": "affected",
"version": "7.10"
},
{
"status": "affected",
"version": "7.11"
},
{
"status": "affected",
"version": "7.12"
},
{
"status": "affected",
"version": "7.13"
},
{
"status": "affected",
"version": "7.14"
},
{
"status": "affected",
"version": "7.15"
},
{
"status": "affected",
"version": "7.16"
},
{
"status": "affected",
"version": "7.17"
},
{
"status": "affected",
"version": "7.18"
},
{
"status": "affected",
"version": "7.19"
},
{
"status": "affected",
"version": "7.20"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "dwbruijn (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack\u0027s complexity is rated as high. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 3.7,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 3.7,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 2.6,
"vectorString": "AV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-940",
"description": "Improper Verification of Source of a Communication Channel",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-02-23T02:32:07.568Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-347334 | Cesanta Mongoose TCP Sequence Number net_builtin.c getpeer verification of source",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.347334"
},
{
"name": "VDB-347334 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.347334"
},
{
"name": "Submit #755450 | Cesanta Mongoose Embedded Web Server 7.20 Improper Validation of Specified Index, Position, or Offset in I",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.755450"
},
{
"tags": [
"related"
],
"url": "https://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.md"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.md#poc"
}
],
"tags": [
"x_open-source"
],
"timeline": [
{
"lang": "en",
"time": "2026-02-22T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-02-22T01:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-02-22T09:02:38.000Z",
"value": "VulDB entry last update"
}
],
"title": "Cesanta Mongoose TCP Sequence Number net_builtin.c getpeer verification of source"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-2967",
"datePublished": "2026-02-23T02:32:07.568Z",
"dateReserved": "2026-02-22T07:57:28.584Z",
"dateUpdated": "2026-02-23T13:32:57.830Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-2967\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-02-23T13:32:47.660229Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-02-23T13:32:51.789Z\"}}], \"cna\": {\"tags\": [\"x_open-source\"], \"title\": \"Cesanta Mongoose TCP Sequence Number net_builtin.c getpeer verification of source\", \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"dwbruijn (VulDB User)\"}], \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P\"}}, {\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 3.7, \"baseSeverity\": \"LOW\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R\"}}, {\"cvssV3_0\": {\"version\": \"3.0\", \"baseScore\": 3.7, \"baseSeverity\": \"LOW\", \"vectorString\": \"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R\"}}, {\"cvssV2_0\": {\"version\": \"2.0\", \"baseScore\": 2.6, \"vectorString\": \"AV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR\"}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*\"], \"vendor\": \"Cesanta\", \"modules\": [\"TCP Sequence Number Handler\"], \"product\": \"Mongoose\", \"versions\": [{\"status\": \"affected\", \"version\": \"7.0\"}, {\"status\": \"affected\", \"version\": \"7.1\"}, {\"status\": \"affected\", \"version\": \"7.2\"}, {\"status\": \"affected\", \"version\": \"7.3\"}, {\"status\": \"affected\", \"version\": \"7.4\"}, {\"status\": \"affected\", \"version\": \"7.5\"}, {\"status\": \"affected\", \"version\": \"7.6\"}, {\"status\": \"affected\", \"version\": \"7.7\"}, {\"status\": \"affected\", \"version\": \"7.8\"}, {\"status\": \"affected\", \"version\": \"7.9\"}, {\"status\": \"affected\", \"version\": \"7.10\"}, {\"status\": \"affected\", \"version\": \"7.11\"}, {\"status\": \"affected\", \"version\": \"7.12\"}, {\"status\": \"affected\", \"version\": \"7.13\"}, {\"status\": \"affected\", \"version\": \"7.14\"}, {\"status\": \"affected\", \"version\": \"7.15\"}, {\"status\": \"affected\", \"version\": \"7.16\"}, {\"status\": \"affected\", \"version\": \"7.17\"}, {\"status\": \"affected\", \"version\": \"7.18\"}, {\"status\": \"affected\", \"version\": \"7.19\"}, {\"status\": \"affected\", \"version\": \"7.20\"}]}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-02-22T00:00:00.000Z\", \"value\": \"Advisory disclosed\"}, {\"lang\": \"en\", \"time\": \"2026-02-22T01:00:00.000Z\", \"value\": \"VulDB entry created\"}, {\"lang\": \"en\", \"time\": \"2026-02-22T09:02:38.000Z\", \"value\": \"VulDB entry last update\"}], \"references\": [{\"url\": \"https://vuldb.com/?id.347334\", \"name\": \"VDB-347334 | Cesanta Mongoose TCP Sequence Number net_builtin.c getpeer verification of source\", \"tags\": [\"vdb-entry\", \"technical-description\"]}, {\"url\": \"https://vuldb.com/?ctiid.347334\", \"name\": \"VDB-347334 | CTI Indicators (IOB, IOC, IOA)\", \"tags\": [\"signature\", \"permissions-required\"]}, {\"url\": \"https://vuldb.com/?submit.755450\", \"name\": \"Submit #755450 | Cesanta Mongoose Embedded Web Server 7.20 Improper Validation of Specified Index, Position, or Offset in I\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.md\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.md#poc\", \"tags\": [\"exploit\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack\u0027s complexity is rated as high. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-940\", \"description\": \"Improper Verification of Source of a Communication Channel\"}]}], \"providerMetadata\": {\"orgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"shortName\": \"VulDB\", \"dateUpdated\": \"2026-02-23T02:32:07.568Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-2967\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-02-23T13:32:57.830Z\", \"dateReserved\": \"2026-02-22T07:57:28.584Z\", \"assignerOrgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"datePublished\": \"2026-02-23T02:32:07.568Z\", \"assignerShortName\": \"VulDB\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…