CVE-2019-6453

8.1 highEPSS 55%

High (8.1) in mirc mirc. EPSS 55% chance of exploitation in the next 30 days.

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).

Severity

CVSS 3.0

8.1 high

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

EPSS: 55% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CWE: CWE-88
Published: 2019-02-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mirc:mirc

References

https://github.com/proofofcalc/cve-2019-6453-poc
https://proofofcalc.com/advisories/20190218.txt
https://proofofcalc.com/cve-2019-6453-mIRC/
https://twitter.com/proofofcalc/status/1097518413143003136
https://www.exploit-db.com/exploits/46392/

Check your stack JSON