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CVE-2025-48799· NVD / CVE Program· CNA microsoft

Windows Update Service Elevation of Privilege Vulnerability

Noroxi assessment

Priority: Monitor (action score 31/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 69.3% of all records.
  • 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.
  • Fixed version: Windows 10 Version 1607 for 32-bit Systems 10.0.14393.8246; Windows 10 Version 1607 for x64-based Systems 10.0.14393.8246; Windows 10 Version 1809 for 32-bit Systems 10.0.17763.7558.

Low priority for now. Upgrade to Windows 10 Version 1607 for 32-bit Systems 10.0.14393.8246; Windows 10 Version 1607 for x64-based Systems 10.0.14393.8246; Windows 10 Version 1809 for 32-bit Systems 10.0.17763.7558 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Improper link resolution before file access ('link following') in Windows Update Service allows an authorized attacker to elevate privileges locally.

HighCVSS 7.8 · v3.1—Proof of concept Fix available
Published
Jul 8, 2025
Updated
Jun 17, 2026
EPSS
1.2% · 69th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
7.8
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:H/A:H/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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-48799

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoftwindows 10 1607
microsoftwindows 10 1809
microsoftwindows 10 21h2
microsoftwindows 10 22h2
microsoftwindows 11 22h2
microsoftwindows 11 23h2
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 10 Version 1607

    • 10.0.14393.0 and later · before 10.0.14393.8246affected

  • Microsoft Windows 10 Version 1809

    • 10.0.17763.0 and later · before 10.0.17763.7558affected

  • Microsoft Windows 10 Version 21H2

    • 10.0.19044.0 and later · before 10.0.19044.6093affected

  • Microsoft Windows 10 Version 22H2

    • 10.0.19045.0 and later · before 10.0.19045.6093affected

  • Microsoft Windows 11 version 22H2

    • 10.0.22621.0 and later · before 10.0.22621.5624affected

  • Microsoft Windows 11 version 22H3

    • 10.0.22631.0 and later · before 10.0.22631.5624affected

  • Microsoft Windows 11 Version 23H2

    • 10.0.22631.0 and later · before 10.0.22631.5624affected

  • 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-2018-8174A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine RemKEV
    86Now
  • CVE-2022-44698Windows SmartScreen Security Feature Bypass VulnerabilityKEV
    74This week
  • CVE-2026-21510Windows Shell Security Feature Bypass VulnerabilityKEV
    72This week

Published before and after this one in the same product

  • ← EarlierCVE-2025-47999Jul 8, 2025 · Windows Hyper-V Denial of Service Vulnerability
    27Monitor
  • ← EarlierCVE-2025-48000Jul 8, 2025 · Windows Connected Devices Platform Service Elevation of Privilege Vulnerability
    31Monitor
  • Later →CVE-2025-48814Jul 8, 2025 · Remote Desktop Licensing Service Security Feature Bypass Vulnerability
    30Monitor

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 10 Version 1607 for 32-bit Systems10.0.14393.8246 · KB5062560Microsoft (MSRC)
Windows 10 Version 1607 for x64-based Systems10.0.14393.8246 · KB5062560Microsoft (MSRC)
Windows 10 Version 1809 for 32-bit Systems10.0.17763.7558 · KB5062557Microsoft (MSRC)
Windows 10 Version 1809 for x64-based Systems10.0.17763.7558 · KB5062557Microsoft (MSRC)
Windows 10 Version 21H2 for 32-bit Systems10.0.19044.6093 · KB5062554Microsoft (MSRC)
Windows 10 Version 21H2 for ARM64-based Systems10.0.19044.6093 · KB5062554Microsoft (MSRC)
Windows 10 Version 21H2 for x64-based Systems10.0.19044.6093 · KB5062554Microsoft (MSRC)
Windows 10 Version 22H2 for 32-bit Systems10.0.19045.6093 · KB5062554Microsoft (MSRC)
Windows 10 Version 22H2 for ARM64-based Systems10.0.19045.6093 · KB5062554Microsoft (MSRC)
Windows 10 Version 22H2 for x64-based Systems10.0.19045.6093 · KB5062554Microsoft (MSRC)
Windows 11 Version 22H2 for ARM64-based Systems10.0.22621.5624 · KB5062552Microsoft (MSRC)
Windows 11 Version 22H2 for x64-based Systems10.0.22621.5624 · KB5062552Microsoft (MSRC)
Windows 11 Version 23H2 for ARM64-based Systems10.0.22631.5624 · KB5062552Microsoft (MSRC)
Windows 11 Version 23H2 for x64-based Systems10.0.22631.5624 · KB5062552Microsoft (MSRC)
Windows 11 Version 24H2 for ARM64-based Systems10.0.26100.4652 · KB5062553Microsoft (MSRC)
Windows 11 Version 24H2 for x64-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

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×3

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:2692025-07-08
Proof-of-concept repository on GitHubstars:02025-08-05
Proof-of-concept repository on GitHubstars:02025-09-02

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.

  1. First PoC-1 d
  2. Published
  3. TodayOct 24, 2026+473 d
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-2026-25187245 days apartWinlogon Elevation of Privilege Vulnerability
    32Monitor
  • CVE-2026-70563427 days apartWindows Shell Spoofing Vulnerability
    32Monitor
  • CVE-2024-43551273 days apartWindows Storage Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2026-42989336 days apartWinlogon Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2026-45586336 days apartWindows Collaborative Translation Framework (CTFMON) Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2026-49176371 days apartWindows WalletService Elevation of Privilege Vulnerability
    31Monitor

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
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-59 · Improper Link Resolution Before File Access ('Link Following')

CVSS vector

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

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.

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