{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-125400", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-09T22:03:15.134Z", "datePublished": "2026-11-09T23:28:02.839Z", "dateUpdated": "2026-11-09T23:28:02.839Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-09T23:28:02.839Z"}, "datePublic": "2026-11-06T00:00:00.000Z", "title": "Ettercap through 0.8.4.1 Use-After-Free via PCRE2 Filter Substitution", "descriptions": [{"lang": "en", "value": "Ettercap through 0.8.4.1 contains a use-after-free vulnerability in func_pcre() in src/ec_filter.c that reads the PCRE2 ovector after freeing match data. Network-adjacent attackers can send packets matching a loaded pcre_regex() substitution filter to corrupt memory and potentially execute code as root."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Use After Free", "cweId": "CWE-416", "type": "CWE"}]}], "affected": [{"vendor": "Ettercap", "product": "ettercap", "packageURL": "pkg:github/Ettercap/ettercap", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThanOrEqual": "0.8.4.1", "status": "affected", "versionType": "custom"}], "repo": "https://github.com/Ettercap/ettercap"}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ettercap-project:ettercap:*:*:*:*:*:*:*:*", "versionEndIncluding": "0.8.4.1"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/Ettercap/ettercap/security/advisories/GHSA-f3j5-rhhr-85j5", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-f3j5-rhhr-85j5)"}, {"url": "https://github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98", "tags": ["patch"]}, {"url": "https://github.com/Ettercap/ettercap/pull/1330", "tags": ["issue-tracking", "patch"]}, {"url": "https://github.com/Ettercap/ettercap/blob/v0.8.4.1/src/ec_filter.c#L593-L625", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: Ettercap through 0.8.4.1 Use-After-Free via PCRE2 Filter Substitution", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/ettercap-through-0.8.4.1-use-after-free-via-pcre2-filter-substitution"}], "credits": [{"lang": "en", "value": "Adiel Sol, Arad Inbar, Erez Cohen, Nir Somech, Ben Grinberg, Daniel Lubel, Shir Sadon (DREAM Security Research Team)", "type": "finder"}, {"lang": "en", "value": "Emilio Escobar", "type": "remediation developer"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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