Microsoft
Time-of-check time-of-use (toctou) race condition in .NET allows an authorized attacker to elevate privileges locally
At a glance
Low rather than Medium: UK relevance is 40 of 100, little UK-specific signal so far.
Briefing
There is no written leader briefing for this story yet. These questions come from the facts we hold.
Questions to ask IT
- Do we run Microsoft .net, and which versions?
- If it is not yet patched, what mitigation is in place, and will the fix be done by 11 Dec?
Next steps
- Confirm whether this affects systems or suppliers in your estate
Vulnerability facts
Full CVE detail CVE-2026-114155- 7.5 · HighExploitable only with local access and a low-privilege account, under specific conditions, but only if a user takes an action, such as opening a file or link. High impact on confidentiality, integrity and availability, and it can reach beyond the vulnerable system.CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
- Not listed
- Not linked from the CVE record
No technical write-up beyond these facts and the summary below yet.
Next steps
- Review the advisory against your asset inventory and patch cadence
Summary
- Changes made to the security updates links and information.
Read the original reportMicrosoft Security Update Guide RSS(opens in a new tab)
Products and services involved
- Microsoft .net84% match confidence · CVE-2026-114155
Pulse
Last change 43m ago · Next recheck 12 Nov 2026, 18:03 UK time
- Story11 Nov 2026, 18:03 UK time · 43m 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-2026-114155 .NET Elevation of Privilege Vulnerability
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ClaimedHeadline60% confidence
Time-of-check time-of-use (toctou) race condition in.NET allows an authorised attacker to elevate privileges locally
- ProbableSummary fact75% confidence
Changes made to the security updates links and information.
- ConfirmedCVE identifier95% confidence
Event involves CVE-2026-114155