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CVE-2025-48809· NVD / CVE Program· CNA microsoft

Windows Secure Kernel Mode Information Disclosure Vulnerability

Processor optimization removal or modification of security-critical code in Windows Kernel allows an authorized attacker to disclose information locally.

MediumCVSS 5.5 · v3.1—No exploit Fix available

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Published
Jul 8, 2025
Updated
Jun 17, 2026
EPSS
0.5% · 37th percentile
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Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
5.5
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
microsoftwindows 11 24h2
microsoftwindows server 2025

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft windows server 2025before 10.0.26100.4652

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft Windows 11 Version 24H2

    • 10.0.26100.0 and later · before 10.0.26100.4652affected

  • Microsoft Windows Server 2025

    • 10.0.26100.0 and later · before 10.0.26100.4652affected

  • Microsoft Windows Server 2025 (Server Core installation)

    • 10.0.26100.0 and later · before 10.0.26100.4652affected

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-60710Host Process for Windows Tasks Elevation of Privilege VulnerabilityKEV
    62This week
  • CVE-2025-50165Windows Graphics Component Remote Code Execution Vulnerability
    42Plan
  • CVE-2025-21311Windows NTLM V1 Elevation of Privilege Vulnerability
    40Plan
  • CVE-2026-50487Windows DNS Client Elevation of Privilege Vulnerability
    39Monitor
  • CVE-2026-62744Microsoft Windows Media Foundation Remote Code Execution Vulnerability
    35Monitor
  • CVE-2026-85877Windows Print Spooler Remote Code Execution Vulnerability
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Windows 11 Version 24H2 for ARM64-based Systems10.0.26100.4652 · KB5062553Microsoft (MSRC)
Windows Server 202510.0.26100.4652 · KB5062553Microsoft (MSRC)
Windows Server 2025 (Server Core installation)10.0.26100.4652 · KB5062553Microsoft (MSRC)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-266360 days apartWindows Kernel Information Disclosure Vulnerability
    22Monitor
  • CVE-2025-488100 days apartWindows Secure Kernel Mode Information Disclosure Vulnerability
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-1037 · Processor Optimization Removal or Modification of Security-critical Code

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records