CVE-2019-6453
mIRC before 7.55 allows remote command execution by using argument injection through custom URI...
CVE-2019-6453 is a high vulnerability (CVSS 8.1) in Mirc, published February 18, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 54.6%, the 99th percentile. No source names a fixed version.
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).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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).
- Record
CVE-2019-6453- 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 - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-88
- Updated
- 2026-11-02
CVE List No score
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).
- Record
CVE-2019-6453- Updated
- 2026-11-02
EUVDEUVD-2019-16013 No score
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).
- Record
EUVD-2019-16013- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-95vj-g5cr-7j53
mIRC before 7.55 allows remote command execution by using argument injection through custom URI...
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).
- Record
GHSA-95vj-g5cr-7j53- 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 - Weakness
- CWE-88
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | mIRC < 7.55 - 'Custom URI Protocol Handlers' Remote Command Execution | 2019-02-18 |
| PoC in GitHub | andripwn/mIRC-CVE-2019-6453 | 2019-07-18 |
| PoC in GitHub | proofofcalc/cve-2019-6453-poc | 2019-02-18 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, Exploit-DB, GitHub Advisories, NVD, PoC in GitHub |