{"id":"CVE-2026-93857","published":"2026-10-27T16:17:32Z","modified":"2026-10-29T11:17:38Z","title":"A stack-based buffer overflow vulnerability in Fireware OS's SIP proxy allows a remote, unauthenticated attacker to…","vendor":"WatchGuard","product":"Fireware OS","tier":"core","eol":null,"description":{"text":"A stack-based buffer overflow vulnerability in Fireware OS's SIP proxy allows a remote, unauthenticated attacker to execute arbitrary code by sending a specially crafted request through a policy that uses the SIP proxy.","provenance":"source","from":"NVD"},"summary":{"text":"A stack-based buffer overflow in the SIP proxy component of WatchGuard's Fireware OS lets a remote attacker execute arbitrary code. The attacker needs no authentication, only the ability to send a specially crafted request through a policy that uses the SIP proxy.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T07:24:45Z"},"cvss":{"score":9.2,"severity":"CRITICAL","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","provenance":"source","from":"NVD"},"epss":{"score":0.00471,"percentile":0.40778,"date":"2026-10-31","provenance":"source"},"kev":null,"vulncheckKev":null,"exploited":false,"otx":null,"cwes":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"},{"id":"CWE-121","name":"Stack-based Buffer Overflow"},{"id":"CWE-787","name":"Out-of-bounds Write"}],"references":[{"url":"https://psirt.watchguard.com/CVE-2026-93857","tags":[]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-111156","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-111156","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[],"timeline":[{"date":"2026-10-27","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93857","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":14.6,"factors":[{"name":"In a KEV catalog","points":0.0,"detail":"not listed"},{"name":"Recent KEV listing","points":0.0,"detail":"not listed"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":8.16,"detail":"percentile 0.4078"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":6.44,"detail":"base score 9.2"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}