{"id":"CVE-2026-76459","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-76459","generatedAt":"2026-10-23T21:16:17.916Z","title":"This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.","description":"As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco NX-OS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.\r\n\r\nThe vulnerabilities tracked by CVE-2026-76459 are related to out-of-bounds write issues that are grouped under the Common Weakness Enumeration (CWE) CWE-787.","published":"2026-10-07T17:16:59.000Z","lastModified":"2026-10-09T14:17:22.000Z","status":"Awaiting Analysis","sourceIdentifier":"psirt@cisco.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":[],"epss":{"score":0.00307,"percentile":0.22302,"date":"2026-10-22","history":[{"date":"2026-10-08","score":0.00282,"percentile":0.18977}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.31%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-09T14:45:10.000Z","detail":{"from":"8.8","score":"9.8","severity":"CRITICAL","fromSeverity":"HIGH"},"summary":"Now scored CVSS 9.8 CRITICAL (was 8.8)."},{"kind":"new","label":"New CVE","at":"2026-10-07T17:16:59.000Z","detail":{"score":"8.8","severity":"HIGH","publishedAt":"2026-10-07T17:16:58.553Z"},"summary":"New CVE, critical severity (CVSS 9.8)."}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-nxosw1-cWzSbtR","source":"psirt@cisco.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-76459","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}