CVE tracker / CVE-2025-26636

CVE-2025-26636

CVE-2025-26636 is the Windows Kernel Information Disclosure Vulnerability. Microsoft rates it Important, CVSS 5.5. It is not in CISA's Known Exploited Vulnerabilities catalog. Published July 8, 2025.

Risk summary

MediumInformation Disclosure
5.5
CVSS v3 base
0.5%
EPSS: chance of exploitation in 30 days
Medium
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV

Microsoft describes it: “Processor optimization removal or modification of security-critical code in Windows Kernel allows an authorized attacker to disclose information locally.”

How to fix it

Microsoft lists 3 affected products and the update that fixes each:

What Microsoft changed

Details

Weakness
CWE-1037: Processor Optimization Removal or Modification of Security-critical Code
Publicly disclosed (Microsoft)
No
Exploited (Microsoft)
No
Known exploited (CISA KEV)
Not listed
Published
July 8, 2025
Last revised
July 8, 2025

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References

Microsoft Security Update Guide NVD CVE record CWE

From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.