CVE-2025-26687
published 2025-04-08CVE-2025-26687: Use after free in Windows Win32K - GRFX allows an unauthorized attacker to elevate privileges over a network.
PriorityP344high7.5CVSS 3.1
AVNACHPRNUIRSUCHIHAH
EPSS
1.08%
61.6th percentile
Use after free in Windows Win32K - GRFX allows an unauthorized attacker to elevate privileges over a network.
Affected
54 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | 365_copilot | < 16.0.18730.20000 | 16.0.18730.20000 |
| microsoft | microsoft_office_for_android | >= 16.0.1 < 16.0.18730.20000 | 16.0.18730.20000 |
| microsoft | microsoft_office_for_universal | >= 16.0.1 < 16.0.14326.22331 | 16.0.14326.22331 |
| microsoft | office | < 16.0.14326.22331 | 16.0.14326.22331 |
| microsoft | windows_10_1507 | < 10.0.10240.20978 | 10.0.10240.20978 |
| microsoft | windows_10_1607 | < 10.0.14393.7969 | 10.0.14393.7969 |
| microsoft | windows_10_1809 | < 10.0.17763.7136 | 10.0.17763.7136 |
| microsoft | windows_10_21h2 | < 10.0.19044.5737 | 10.0.19044.5737 |
| microsoft | windows_10_22h2 | < 10.0.19045.5737 | 10.0.19045.5737 |
| microsoft | windows_10_version_1507 | >= 10.0.10240.0 < 10.0.10240.20978 | 10.0.10240.20978 |
| microsoft | windows_10_version_1607 | >= 10.0.14393.0 < 10.0.14393.7969 | 10.0.14393.7969 |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < 10.0.17763.7136 | 10.0.17763.7136 |
| microsoft | windows_10_version_21h2 | >= 10.0.19044.0 < 10.0.19044.5737 | 10.0.19044.5737 |
| microsoft | windows_10_version_22h2 | >= 10.0.19045.0 < 10.0.19045.5737 | 10.0.19045.5737 |
| microsoft | windows_11_22h2 | < 10.0.22621.5189 | 10.0.22621.5189 |
| microsoft | windows_11_23h2 | < 10.0.22631.5189 | 10.0.22631.5189 |
| microsoft | windows_11_24h2 | < 10.0.26100.3775 | 10.0.26100.3775 |
| microsoft | windows_11_version_22h2 | >= 10.0.22621.0 < 10.0.22621.5189 | 10.0.22621.5189 |
| microsoft | windows_11_version_22h3 | >= 10.0.22631.0 < 10.0.22631.5189 | 10.0.22631.5189 |
| microsoft | windows_11_version_23h2 | >= 10.0.22631.0 < 10.0.22631.5189 | 10.0.22631.5189 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.3775 | 10.0.26100.3775 |
| microsoft | windows_server_2008 | — | — |
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.1.7601.0 < 6.1.7601.27670 | 6.1.7601.27670 |
| microsoft | windows_server_2008_service_pack_2 | >= 6.0.6003.0 < 6.0.6003.23220 | 6.0.6003.23220 |
| microsoft | windows_server_2012 | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_msrc7.5HIGH
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VulDB
Microsoft Windows up to Server 2025 Win32k use after free (Nessus ID 234050)
vuldb·2026-05-23·CVSS 7.5
CVE-2025-26687 [HIGH] Microsoft Windows up to Server 2025 Win32k use after free (Nessus ID 234050)
A vulnerability has been found in Microsoft Windows and classified as critical. Impacted is an unknown function of the component Win32k. Performing a manipulation results in use after free.
This vulnerability is reported as CVE-2025-26687. The attack is possible to be carried out remotely. No exploit exists.
Applying a patch is the recommended action to fix this issue.
GHSA
GHSA-p9qw-h5h2-6vw8: Use after free in Windows Win32K - GRFX allows an unauthorized attacker to elevate privileges over a network
ghsa_unreviewed·2025-04-08
CVE-2025-26687 [HIGH] CWE-416 GHSA-p9qw-h5h2-6vw8: Use after free in Windows Win32K - GRFX allows an unauthorized attacker to elevate privileges over a network
Use after free in Windows Win32K - GRFX allows an unauthorized attacker to elevate privileges over a network.
Microsoft
Win32k Elevation of Privilege Vulnerability
vendor_msrc·2025-04-08·CVSS 7.5
CVE-2025-26687 [HIGH] CWE-416 Win32k Elevation of Privilege Vulnerability
Win32k Elevation of Privilege Vulnerability
Description: Use after free in Windows Win32K - GRFX allows an unauthorized attacker to elevate privileges over a network.
FAQ: What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
FAQ: Are the updates for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems currently available?
Yes. As of April 9, 2025, the security update (5055547) for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems are available. Customers running Windows 10 should ensure the update is installed to be protected from this vulnerability.
FAQ: According to the CVSS metric, the attack complexity is high (AC:H). What d
Microsoft
xen/events: close evtchn after mapping cleanup
vendor_msrc·2024-04-09·CVSS 5.5
CVE-2024-26687 [MEDIUM] CWE-459 xen/events: close evtchn after mapping cleanup
xen/events: close evtchn after mapping cleanup
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.microsof
No detection rules found.
No public exploits indexed.
2025-04-08
Published