Security readout for executives and security teams
This is an old mIRC client vulnerability, not a server-side internet exposure. A crafted, overly long irc:// link could crash or take over vulnerable mIRC versions before 6.11 when the URL handler is invoked. Business risk is mainly legacy Windows endpoints where mIRC remains installed or associated with IRC links. Exposure is likely limited to legacy endpoints with mIRC versions before 6.11 installed, especially where mIRC handles irc:// links from browsers, email, chat, documents, or web pages. Modern environments without mIRC or with newer versions are unlikely to be affected based on the provided sources. Treat as a focused legacy endpoint cleanup issue. It deserves prompt remediation if mIRC is present, because the impact is code execution. It should not displace current externally exposed critical issues unless inventories show vulnerable mIRC remains deployed. Mitigation focus: Inventory endpoints for mIRC installations and recorded versions.; Remove mIRC where there is no approved business need.; Upgrade any mIRC version before 6.11 to a fixed release..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2003-1336 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- mirc-ircprotocol-execute-code(13405)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.