CVE-2026-20337 (GCVE-0-2026-20337)
Vulnerability from cvelistv5 – Published: 2026-08-07 16:41 – Updated: 2026-08-07 18:11
VLAI
EPSS
VEX
Title
ClamAV ZIP File Format Processing Memory Corruption Vulnerability
Summary
A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device.
This vulnerability is due to improper boundary checks for content in zip files during scanning, which may result in an out-of-bounds write condition. An attacker could exploit this vulnerability by submitting a crafted zip file for scanning. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Secure Endpoint |
Affected:
7.0.5
Affected: 6.2.19 Affected: 7.3.3 Affected: 7.2.13 Affected: 6.1.5 Affected: 6.3.1 Affected: 6.2.5 Affected: 7.3.5 Affected: 6.2.1 Affected: 7.2.7 Affected: 7.1.1 Affected: 6.3.5 Affected: 6.2.9 Affected: 7.3.1 Affected: 6.1.7 Affected: 7.2.11 Affected: 7.2.3 Affected: 7.1.5 Affected: 6.3.3 Affected: 7.3.9 Affected: 6.2.3 Affected: 6.1.9 Affected: 6.0.9 Affected: 7.2.5 Affected: 6.0.7 Affected: 6.3.7 Affected: 1.12.3 Affected: 1.8.0 Affected: 1.11.1 Affected: 1.12.4 Affected: 1.10.0 Affected: 1.12.0 Affected: 1.8.1 Affected: 1.10.1 Affected: 1.12.1 Affected: 1.12.6 Affected: 1.14.0 Affected: 1.10.2 Affected: 1.12.7 Affected: 1.12.2 Affected: 1.6.0 Affected: 1.9.0 Affected: 1.11.0 Affected: 1.7.0 Affected: 1.13.0 Affected: 1.8.4 Affected: 1.13.1 Affected: 1.9.1 Affected: 1.12.5 Affected: 1.13.2 Affected: 8.1.7.21512 Affected: 8.1.7 Affected: 8.1.5 Affected: 8.1.3.21242 Affected: 8.1.3 Affected: 8.1.5.21322 Affected: 8.1.7.21417 Affected: 1.14.1 Affected: 1.15.1 Affected: 1.15.2 Affected: 1.15.3 Affected: 1.15.4 Affected: 1.15.5 Affected: 1.15.6 Affected: 1.16.0 Affected: 1.16.1 Affected: 1.16.2 Affected: 1.16.3 Affected: 1.18.0 Affected: 1.18.1 Affected: 1.20.0 Affected: 1.21.0 Affected: 1.21.1 Affected: 1.21.2 Affected: 1.21.3 Affected: 1.22.0 Affected: 1.22.1 Affected: 1.22.2 Affected: 1.22.3 Affected: 1.22.4 Affected: 1.24.0 Affected: 1.24.1 Affected: 1.24.2 Affected: 1.24.3 Affected: 1.24.4 Affected: 1.26.0 Affected: 1.24.5 Affected: 1.26.1 Affected: 1.27.0 Affected: 1.15.0 Affected: 1.17.0 Affected: 1.17.1 Affected: 1.17.2 Affected: 1.19.0 Affected: 1.20.1 Affected: 1.20.2 Affected: 1.20.3 Affected: 1.20.4 Affected: 1.20.5 Affected: 1.20.6 Affected: 1.23.0 Affected: 1.23.1 Affected: 1.20.7 Affected: 1.20.8 Affected: 1.25.0 Affected: 1.25.1 Affected: 1.25.2 Affected: 1.27.1 Affected: 1.27.2 Affected: 7.3.13 Affected: 7.3.15 Affected: 7.4.1 Affected: 7.4.1.20425 Affected: 7.4.1.20439 Affected: 7.4.3 Affected: 7.4.3.20679 Affected: 7.4.5 Affected: 7.5.1.20813 Affected: 7.5.1.20833 Affected: 7.5.3 Affected: 7.5.5 Affected: 8.0.1.21160 Affected: 8.0.1.21164 Affected: 7.5.7 Affected: 7.5.9 Affected: 7.5.11 Affected: 8.1.7.21585 Affected: 7.5.13.21586 Affected: 7.5.13.21598 Affected: 8.2.1.21612 Affected: 8.2.1.21650 Affected: 7.5.15.21611 Affected: 7.5.17.21680 Affected: 8.2.3.30119 Affected: 8.2.4.30130 Affected: 8.4.0 Affected: 7.5.19 Affected: 8.4.1.30298 Affected: 8.4.2.30317 Affected: 8.4.1.30307 Affected: 7.5.20 Affected: 8.4.3 Affected: 8.4.4.30419 Affected: 8.4.4.30467 Affected: 7.5.21.21732 Affected: 8.4.5.30483 |
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"lang": "en",
"value": "A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device.\r\n\r\nThis vulnerability is due to improper boundary checks for content in zip files during scanning, which may result in an out-of-bounds write condition. An attacker could exploit this vulnerability by submitting a crafted zip file for scanning. 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": [
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"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": [
{
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"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"
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{
"descriptions": [
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"description": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
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"references": [
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"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": [
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"discovery": "EXTERNAL"
},
"title": "ClamAV ZIP File Format Processing Memory Corruption Vulnerability"
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"nvd": "{\"cve\":{\"id\":\"CVE-2026-20337\",\"sourceIdentifier\":\"psirt@cisco.com\",\"published\":\"2026-08-07T17:17:02.413\",\"lastModified\":\"2026-08-07T19:17:41.010\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device.\\r\\n\\r\\nThis vulnerability is due to improper boundary checks for content in zip files during scanning, which may result in an out-of-bounds write condition. An attacker could exploit this vulnerability by submitting a crafted zip file for scanning. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.\"}],\"affected\":[{\"source\":\"psirt@cisco.com\",\"affectedData\":[{\"vendor\":\"Cisco\",\"product\":\"Cisco Secure Endpoint\",\"defaultStatus\":\"unknown\",\"versions\":[{\"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\":\"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\":\"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\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-08-07T18:11:33.953042Z\",\"id\":\"CVE-2026-20337\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-120\"}]}],\"references\":[{\"url\":\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26\",\"source\":\"psirt@cisco.com\"}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-20337\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-07T18:11:33.953042Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-07T18:11:54.077Z\"}}], \"cna\": {\"title\": \"ClamAV ZIP File Format Processing Memory Corruption Vulnerability\", \"source\": {\"defects\": [\"CSCwu34288\"], \"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\": \"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\": \"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 zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device.\\r\\n\\r\\nThis vulnerability is due to improper boundary checks for content in zip files during scanning, which may result in an out-of-bounds write condition. An attacker could exploit this vulnerability by submitting a crafted zip file for scanning. 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-120\", \"description\": \"Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-08-07T16:41:51.036Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-20337\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-07T18:11:57.408Z\", \"dateReserved\": \"2025-10-08T11:59:15.413Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-08-07T16:41:51.036Z\", \"assignerShortName\": \"cisco\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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