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CVE-2003-1336

63
FAUCET Score

CVE-2003-1336 describes a critical buffer overflow vulnerability in mIRC versions prior to 6.11, allowing remote attackers to execute arbitrary code by crafting a specially long irc:// URL. With a CVSS score of 9.3, this vulnerability is highly severe, requiring medium attack complexity but granting complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, exploit intelligence indicates the existence of Metasploit modules and ExploitDB entries, confirming readily available exploit code. Despite this, there is no recorded community discussion or media coverage, suggesting it is not currently a focus of widespread attention or active exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.1CPE matchmatch criteria
cpe:2.3:a:mirc:mirc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
35.71%
Probability of exploitation in next 30 days
EPSS Percentile
98.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Metasploit: mIRC IRC URL Buffer Overflow · Oct 13, 2003
ExploitDB: EDB-16530 · May 9, 2010
This CVE's current EPSS score of 0.3571 is in the 96th percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

archives.neohapsis.com / archives/ntbugtraq/2003-q4/0060.html
Patch
secunia.com / advisories/9996
PatchVendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/13405
osvdb.org / 2665
securiteam.com / windowsntfocus/6M00B0U8KE.html
Patch
securityfocus.com / bid/8819
ExploitPatch