Microsoft · Code execution
HEVC Video Extensions Remote Code Execution Vulnerability
At a glance
Low rather than Medium: UK relevance is 40 of 100, little UK-specific signal so far.
Briefing
- Organisations should assess whether Microsoft Windows Codecs Library is present in their estate and review associated risk.
Questions to ask IT
- Do we run Microsoft Windows, and which versions?
- If it is not yet patched, what mitigation is in place, and will the fix be done by 10 Dec?
Next steps
- Confirm whether this affects systems or suppliers in your estate
- The vulnerability involves an integer underflow (wrap or wraparound) in Microsoft Windows Codecs Library that could allow code execution over a network.
Next steps
- Review the advisory against your asset inventory and patch cadence
Summary
- A vulnerability in Microsoft Windows Codecs Library could allow an attacker to execute code over a network.
Read the original reportMicrosoft Security Update Guide RSS(opens in a new tab)
Products and services involved
- Microsoft Windows98% match confidence · CVE-2026-114164
Pulse
Last change 59m ago · Next recheck 11 Nov 2026, 19:03 UK time
- Story10 Nov 2026, 19:03 UK time · 59m ago
Linked reporting from Microsoft Security Update Guide RSS (vendor psirt).
Read source (Microsoft Security Update Guide RSS)
1 entry so far. The timeline chart appears once this story has more history.
Sources
CVE-2026-114164 HEVC Video Extensions Remote Code Execution Vulnerability
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ClaimedHeadline60% confidence
HEVC Video Extensions Remote Code Execution Vulnerability
- ProbableSummary fact75% confidence
Integer underflow (wrap or wraparound) in Microsoft Windows Codecs Library allows an unauthorised attacker to execute code over a network.
- ConfirmedCVE identifier95% confidence
Event involves CVE-2026-114164