CVE-2019-6453
mIRC before 7.55 allows remote command execution by using argument injection through custom URI protocol handlers.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 54.6%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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).
- CVSS 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 54.57% probability · 99th percentile
- Public exploits
- 1 in Exploit-DB · first 18 February 2019
- CISA KEV
- Not listed
- Weakness
- CWE-88
- Affected
- mirc/mirc
- Source
- cve@mitre.org
EPSS moved from 32.8% on 21 September 2026 to 54.6% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://github.com/proofofcalc/cve-2019-6453-pocExploit, Third Party Advisory
- https://proofofcalc.com/advisories/20190218.txtThird Party Advisory
- https://proofofcalc.com/cve-2019-6453-mIRC/Exploit, Third Party Advisory
- https://twitter.com/proofofcalc/status/1097518413143003136Exploit, Third Party Advisory
- https://www.exploit-db.com/exploits/46392/Exploit, Third Party Advisory, VDB Entry
- https://www.mirc.com/news.htmlProduct
- https://github.com/proofofcalc/cve-2019-6453-pocExploit, Third Party Advisory
- https://proofofcalc.com/advisories/20190218.txtThird Party Advisory
- https://proofofcalc.com/cve-2019-6453-mIRC/Exploit, Third Party Advisory
- https://twitter.com/proofofcalc/status/1097518413143003136Exploit, Third Party Advisory
- https://www.exploit-db.com/exploits/46392/Exploit, Third Party Advisory, VDB Entry
- https://www.mirc.com/news.htmlProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.