{"affected":[{"defaultStatus":"unaffected","product":"libexpat","source":"CNA: mitre","vendor":"libexpat project","versions":[{"lessThan":"2.8.4","status":"affected","version":"0","versionType":"semver"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]}],"cveId":"CVE-2026-76957","cwes":["CWE-416"],"description":"libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.","epss":{"date":"2026-11-09","percentile":0.01123,"score":0.00107},"exploits":[],"kev":null,"metrics":[{"score":4.9,"severity":"medium","source":"CNA: mitre","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"}],"modifiedAt":1794314987454,"publishedAt":1787200084788,"references":[{"source":"CNA: mitre","tags":[],"url":"https://github.com/libexpat/libexpat/pull/1322"},{"source":"CNA: mitre","tags":[],"url":"https://github.com/libexpat/libexpat/pull/1329"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}],"remediation":[],"revision":"bb95490ee479b6039db254c0c39494b405573bcd669bebb476fe37a6fec9845c","sources":[{"modifiedAt":1794314987454,"name":"CNA: mitre","retrievedAt":1794316758649,"url":"https://www.cve.org/CVERecord?id=CVE-2026-76957"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794316770516,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-76957"}],"ssvc":{"assessedAt":1787238341792,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"CVE-2026-76957","updatedAt":1794316770516}