{"id":"CVE-2019-6453","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-6453","generatedAt":"2026-10-27T22:28:50.798Z","title":"mIRC before 7.55 allows remote command execution by using argument injection through custom URI protocol handlers.","description":"mIRC before 7.55 allows remote command execution by using argument injection through custom URI protocol handlers. The attacker can specify an irc:// URI that loads an arbitrary .ini file from a UNC share pathname. Exploitation depends on browser-specific URI handling (Chrome is not exploitable).","published":"2019-02-18T15:29:00.000Z","lastModified":"2026-06-17T02:39:04.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":8.1,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-88"],"affected":["mirc/mirc"],"epss":{"score":0.54571,"percentile":0.9901,"date":"2026-10-26","history":[{"date":"2026-09-21","score":0.32818,"percentile":0.98318},{"date":"2026-09-22","score":0.54292,"percentile":0.98961}]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2019-02-18","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":46392,"kind":"exploit","title":"mIRC < 7.55 - 'Custom URI Protocol Handlers' Remote Command Execution","url":"https://www.exploit-db.com/exploits/46392","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/remote/46392.txt","file":"exploits/windows/remote/46392.txt","published":"2019-02-18","added":"2019-02-18","updated":"2019-02-20","author":"ProofOfCalc","type":"remote","platform":"windows","port":null,"verified":false,"codes":["CVE-2019-6453"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.commirc754.exe","screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 54.6%, higher than 99% 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":0.54292,"from":0.32818,"percentile":0.98961},"summary":"EPSS moved from 32.8% to 54.3% probability of exploitation in the next thirty days."},{"kind":"epss","label":"EPSS jump","at":"2026-09-21T00:00:00.000Z","detail":{"to":0.32818,"from":0.54292,"percentile":0.98318},"summary":"EPSS moved from 54.3% to 32.8% probability of exploitation in the next thirty days."}],"references":[{"url":"https://github.com/proofofcalc/cve-2019-6453-poc","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://proofofcalc.com/advisories/20190218.txt","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://proofofcalc.com/cve-2019-6453-mIRC/","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://twitter.com/proofofcalc/status/1097518413143003136","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/46392/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://www.mirc.com/news.html","tags":["Product"],"source":"cve@mitre.org"},{"url":"https://github.com/proofofcalc/cve-2019-6453-poc","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://proofofcalc.com/advisories/20190218.txt","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://proofofcalc.com/cve-2019-6453-mIRC/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://twitter.com/proofofcalc/status/1097518413143003136","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/46392/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.mirc.com/news.html","tags":["Product"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-6453","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."}