RCE in a built-in Windows app (Paint) allows remote code execution on widely deployed OS—organization-wide risk that merits broad attention.
CVE-2026-83844
Remote code execution via out-of-bounds read in Windows Paint.
Is CVE-2026-83844 being exploited?
Not confirmed. CVE-2026-83844 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-83844?
CVE-2026-83844 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-83844?
Yes. A fix has been recorded for CVE-2026-83844. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-83844 affect?
CVE-2026-83844 affects Microsoft Paint (mspaint) on Windows. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-83844?
Apply vendor updates when available; restrict access and block untrusted images; enable EDR detections.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution over a network via out-of-bounds read in Microsoft Paint, enabling attacker-controlled code execution.
Immediate action required
- affected>= 11.0.0.0 and < 11.2605.91.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.