{"id":"CVE-2026-76459","aliases":["EUVD-2026-94462","GHSA-7c6x-33hj-4wv3"],"status":"published","title":"Cisco NX-OS Software Security Hardening Release: October 2026 - Out-of-bounds Write 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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00326,"percentile":0.25818,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2026-10-07T16:15:43Z","modified":"2026-11-07T17:29:46Z","products":[{"vendor":"cisco","product":"cisco nx-os software"},{"vendor":"cisco","product":"cisco nx-os system software in aci mode"},{"vendor":"cisco","product":"cisco unified computing system (managed)"}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-nxosw1-cWzSbtR"},{"url":"https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76459"},{"url":"https://github.com/advisories/GHSA-7c6x-33hj-4wv3"}],"sources":{"cve":[{"id":"CVE-2026-76459","title":"Cisco NX-OS Software Security Hardening Release: October 2026 - Out-of-bounds Write 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.","status":"published","published":"2026-10-07T16:15:43.747Z","modified":"2026-11-07T17:29:46.572Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-07T18:35:04.500123Z"}],"euvd":[{"id":"EUVD-2026-94462","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.","status":"published","published":"2026-10-07T16:15:43Z","modified":"2026-11-07T17:29:46Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-07T18:10:08.696559Z"}],"ghsa":[{"id":"GHSA-7c6x-33hj-4wv3","title":"As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco NX-OS...","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.\n\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.","status":"published","published":"2026-10-07T18:32:11Z","modified":"2026-11-07T18:31:26Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-07T18:38:38.541175Z"}],"nvd":[{"id":"CVE-2026-76459","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.","status":"published","published":"2026-10-07T17:16:58.553Z","modified":"2026-11-07T18:17:24.493Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-07T20:06:30.883159Z"}]}}