{"id":"CVE-2026-42919","published":"2026-05-13T14:12:32Z","modified":"2026-05-14T03:56:24Z","title":"F5 BIG-IP Appliance Mode Vulnerability","vendor":"F5","product":"BIG-IP","tier":"tail","description":{"text":"A vulnerability exists in BIG-IP systems that may allow an authenticated attacker with administrative access to escalate their privileges. A successful exploit may allow the attacker to cross a security boundary.\n\n Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","provenance":"source","from":"CVE.org"},"cvss":{"score":6.7,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00288,"percentile":0.21258,"provenance":"source"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"references":[{"url":"https://my.f5.com/manage/s/article/K000158971","tags":["vendor-advisory","patch"]}],"priority":{"score":8.9,"factors":[{"name":"EPSS percentile","points":4.25},{"name":"CVSS severity","points":4.69}]},"vendorSlug":"f5","affectedVersions":[{"vendor":"F5","product":"BIG-IP","versions":[">= 21.0.0, < 21.0.0.1",">= 17.5.0, < 17.5.1.4",">= 17.1.0, < 17.1.3.1",">= 16.1.0"]}],"euvd":{"id":"EUVD-2026-30003","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-f5-big-ip-cwe-121"}}