{"id":"CVE-2016-2233","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-2233","generatedAt":"2026-10-27T18:46:24.709Z","title":"Stack-based buffer overflow in the inbound_cap_ls function in common/inbound.c in HexChat 2.10.2 allows remote IRC servers to cause a denial of service (crash) via a large number of options in a CAP LS message.","description":"Stack-based buffer overflow in the inbound_cap_ls function in common/inbound.c in HexChat 2.10.2 allows remote IRC servers to cause a denial of service (crash) via a large number of options in a CAP LS message.","published":"2017-01-18T17:59:00.000Z","lastModified":"2026-06-17T00:43:43.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-119"],"affected":["hexchat project/hexchat"],"epss":{"score":0.34102,"percentile":0.9839,"date":"2026-10-26","history":[{"date":"2026-09-21","score":0.27157,"percentile":0.98009},{"date":"2026-09-22","score":0.34894,"percentile":0.98362},{"date":"2026-10-03","score":0.33551,"percentile":0.9834}]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2016-04-04","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":39657,"kind":"exploit","title":"Hexchat IRC Client 2.11.0 - CAP LS Handling Buffer Overflow","url":"https://www.exploit-db.com/exploits/39657","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/39657.py","file":"exploits/multiple/dos/39657.py","published":"2016-04-04","added":"2016-04-04","updated":"2016-04-04","author":"PizzaHatHacker","type":"dos","platform":"multiple","port":null,"verified":false,"codes":["CVE-2016-2233"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comhexchat-2.10.0.tar.xz","screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 34.1%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.34894,"from":0.27157,"percentile":0.98362},"summary":"EPSS moved from 27.2% to 34.9% probability of exploitation in the next thirty days."}],"references":[{"url":"http://packetstormsecurity.com/files/136563/Hexchat-IRC-Client-2.11.0-CAP-LS-Handling-Buffer-Overflow.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/95920","source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/39657/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/136563/Hexchat-IRC-Client-2.11.0-CAP-LS-Handling-Buffer-Overflow.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/95920","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/39657/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-2233","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."}