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CVE-2026-24285 Microsoft CVE debrief

CVE-2026-24285 is a Microsoft Windows Win32K use-after-free vulnerability that can allow an authorized attacker to elevate privileges locally. NVD rates it High and maps it to a local, no-UI attack with high impact on confidentiality, integrity, and availability. Official references point to Microsoft’s advisory and a broad set of affected Windows and Server releases, so patching should be prioritized across exposed and unpatched endpoints.

Vendor
Microsoft
Product
Microsoft Office for Android
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-10
Original CVE updated
2026-03-13
Advisory published
2026-03-10
Advisory updated
2026-03-13

Who should care

Windows endpoint and server administrators, vulnerability management teams, and security operations teams responsible for the affected Microsoft Windows releases listed in the official references. Any environment with local user access on unpatched systems should treat this as a priority privilege-escalation issue.

Technical summary

The official description identifies a use-after-free in Windows Win32K, mapped by NVD to CWE-416. The CVSS vector is AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H, which indicates a local attacker with limited privileges and no user interaction can potentially escalate privileges with severe system impact. NVD’s affected-product criteria cover multiple Windows client and server builds, and Microsoft’s advisory is the primary vendor reference.

Defensive priority

High. This is a local privilege-escalation flaw with high impact across many Windows releases, which makes it especially important on shared systems, multi-user endpoints, and servers where an attacker might already have limited access.

Recommended defensive actions

  • Review Microsoft’s security advisory for CVE-2026-24285 and apply the relevant vendor updates to affected Windows and Server builds.
  • Prioritize patching systems that have local interactive access, multiple users, or higher business value, since the attack requires local privileges.
  • Verify the exact OS build against the NVD/MSRC affected-version criteria before and after remediation to avoid leaving older branches exposed.
  • Monitor for signs of local privilege-escalation activity and suspicious post-compromise behavior on any unpatched hosts.
  • Check asset inventory and vulnerability coverage for version mismatches, especially where platform metadata and deployment records do not align cleanly.

Evidence notes

CVE-2026-24285 was published on 2026-03-10 and modified on 2026-03-13. The official CVE/NVD record describes a Windows Win32K use-after-free and NVD marks the record as Analyzed, with a Microsoft vendor advisory as the primary reference. NVD assigns CWE-416 and the CVSS vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. The supplied source metadata also contains an Office Android CPE entry, but the CVE description and Win32K language indicate the primary issue is a Windows privilege-escalation flaw; this debrief follows the official description and reference corpus.

Official resources

Public CVE record published 2026-03-10 and modified 2026-03-13. This debrief is based only on the supplied official CVE/NVD/MSRC sources and does not include exploit instructions or unverified details.