TI-2019-04520 Aliases CVE-2019-6453 GHSA-95vj-g5cr-7j53

mIRC before 7.55 allows remote command execution by using argument injection through…

HIGH 68CWE-88Published 2019-02-18 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-88.

Summary

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).

Why it matters now

EPSS 0.54571 99th percentileScored 2026-11-07

Public exploit Yes 4 exploit referencesTagged by the CNA and NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mirc:mirc::::::::	before 7.55	Vulnerable	mIRC

cpe:2.3:a:mirc:mirc:*:*:*:*:*:*:*:* Versions before 7.55 Vulnerable ·mIRC

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2019-6453
2026-10-03 Alias added: GHSA-95vj-g5cr-7j53
2026-10-16 EPSS moved to the 99th percentile and above

References

Exploit 4

Advisory 1

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

Other 1

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

TI-2008-04241 Stack-based buffer overflow in mIRC 6.34 allows remote attackers to execute arbitrary… CVSS 2.0HIGH 9.3
TI-2003-01236 Buffer overflow in mIRC before 6.11 allows remote attackers to execute arbitrary code via a long irc:// URL. CVSS 2.0HIGH 9.3
TI-2008-06995 mIRC before 6.35 allows attackers to cause a denial of service (crash) via a long nickname. CVSS 3.1HIGH 7.5
TI-2007-04262 Multiple unspecified scripts in mIRC allow user-assisted remote attackers to execute… CVSS 2.0MEDIUM 6.8
TI-2011-04554 mIRC prior to 7.22 has a message leak because chopping of outbound messages is mishandled. CVSS 3.1MEDIUM 5.3
TI-2003-01408 Buffer overflow in mIRC 6.12, when the DCC get dialog window has been minimized and the… CVSS 2.0MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences