CVE-2019-6453 EXPLOIT
8.1
HIGH · CVSS 3.0 · EPSS 54.3% (pctl 99)
Patch early
A public exploit exists.
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).
Scoring
| CVSS | 8.1 (HIGH, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 54.29% — more likely to be exploited than 99% of all CVEs |
| Weakness | CWE-88 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2019-02-18 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| mirc | mirc |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | mIRC < 7.55 - 'Custom URI Protocol Handlers' Remote Command Execution | 2019-02-18 |
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/
- https://www.mirc.com/news.html
- 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/
- https://www.mirc.com/news.html
→ the Explorer · watch your stack · NVD