CVE-2019-6453

high

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).

References

https://proofofcalc.com/advisories/20190218.txt

https://www.exploit-db.com/exploits/46392/

https://www.mirc.com/news.html

https://twitter.com/proofofcalc/status/1097518413143003136

https://proofofcalc.com/cve-2019-6453-mIRC/

https://github.com/proofofcalc/cve-2019-6453-poc

Details

Source: Mitre, NVD

Published: 2019-02-18

Updated: 2026-06-17

Named Vulnerability: Proof of Calc

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.71776