CVE-2003-1336

CVE-2003-1336 is a critical-severity vulnerability in Mirc with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 36% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Description

Buffer overflow in mIRC before 6.11 allows remote attackers to execute arbitrary code via a long irc:// URL.

Frequently asked questions

What is CVE-2003-1336?
Buffer overflow in mIRC before 6.11 allows remote attackers to execute arbitrary code via a long irc:// URL.
How severe is CVE-2003-1336?
CVE-2003-1336 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2003-1336 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 36% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-1336?
CVE-2003-1336 affects Mirc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2003-1336?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2003-1336 published?
CVE-2003-1336 was published on 2003-12-31 and last updated on 2026-06-16.

References

Affected products (1)

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