Memory corruption
Out-of-bounds read in Windows Paint allows an unauthorized attacker to execute code over a network
At a glance
~0.7% estimated chance of attack in 30 days. Exploitation not confirmed.
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
- Are we affected by CVE-2026-83844, and which of our systems would be?
- If it is not yet patched, what mitigation is in place, and will the fix be done by 6 Dec?
Next steps
- Confirm whether this affects systems or suppliers in your estate
Vulnerability facts
Full CVE detail CVE-2026-83844- 7.0 · HighExploitable only with local access without any 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.CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Not listed
- ~0.4% estimated chance of attack in 30 days
- 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
- To comprehensively address the vulnerability identified by this CVE, Microsoft has released a new version of Paint with build version number 11.2609.401.0. Microsoft recommends installing this new version or ensuring that it was automatically updated.
- CVE-2026-83844 has an estimated ~0.7% chance of attack in 30 days (54.6th percentile) as of 2026-11-06 — probability signal, not confirmed exploitation
Read the original reportMicrosoft Security Update Guide RSS(opens in a new tab)
Pulse
Last change 2d ago · Recheck overdue since 7 Nov 2026, 22:07 UK time
- Story6 Nov 2026, 22:07 UK time · 2d 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-2026-83844 Windows Paint Remote Code Execution Vulnerability
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ClaimedHeadline60% confidence
Out-of-bounds read in Windows Paint allows an unauthorised attacker to execute code over a network
- ProbableSummary fact75% confidence
To comprehensively address the vulnerability identified by this CVE, Microsoft has released a new version of Paint with build version number 11.2609.401.0. Microsoft recommends installing this new version or ensuring that it was automatically updated.
- ConfirmedCVE identifier95% confidence
Event involves CVE-2026-83844
- ConfirmedEstimated attack likelihood95% confidence
CVE-2026-83844 has an estimated ~0.7% chance of attack in 30 days (54.6th percentile) as of 2026-11-06 — probability signal, not confirmed exploitation