CVE-2025-26636
CVE-2025-26636 is a medium-severity vulnerability in Microsoft Windows 11 24h2 with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1037.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (33rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-20660
- Weakness: CWE-1037
- Affected product: Microsoft Windows 11 24h2
- Published:
- Last modified:
Description
Processor optimization removal or modification of security-critical code in Windows Kernel allows an authorized attacker to disclose information locally.
Frequently asked questions
- What is CVE-2025-26636?
- Processor optimization removal or modification of security-critical code in Windows Kernel allows an authorized attacker to disclose information locally.
- How severe is CVE-2025-26636?
- CVE-2025-26636 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2025-26636 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-26636?
- CVE-2025-26636 primarily affects Microsoft Windows 11 24h2. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-26636?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-26636 have an EU (EUVD) identifier?
- Yes. CVE-2025-26636 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20660.
- When was CVE-2025-26636 published?
- CVE-2025-26636 was published on 2025-07-08 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
- cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
More vulnerabilities in Microsoft Windows 11 24h2
- CVE-2025-49708 — Critical (CVSS 9.9): Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges over a network.
- CVE-2026-47291 — Critical (CVSS 9.8): Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.
- CVE-2026-45657 — Critical (CVSS 9.8): Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.
- CVE-2026-44815 — Critical (CVSS 9.8): Stack-based buffer overflow in Windows DHCP Client allows an unauthorized attacker to execute code over a network.
- CVE-2026-41096 — Critical (CVSS 9.8): Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.
- CVE-2026-33824 — Critical (CVSS 9.8): Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.
All CVEs affecting Microsoft Windows 11 24h2 →
Other CWE-1037 vulnerabilities
- CVE-2024-45335 — High (CVSS 8.4): Trend Micro Antivirus One, version 3.10.4 and below contains a vulnerability that could allow an attacker to use a…
- CVE-2024-37985 — Medium (CVSS 5.9): Windows Kernel Information Disclosure Vulnerability
- CVE-2025-48810 — Medium (CVSS 5.5): Processor optimization removal or modification of security-critical code in Windows Secure Kernel Mode allows an…
- CVE-2025-48809 — Medium (CVSS 5.5): Processor optimization removal or modification of security-critical code in Windows Kernel allows an authorized…