CVE-2025-21195

Local privilege escalation via improper link resolution

Published Jul 8, 2025 · Updated Feb 13, 2026

Link-following in Microsoft Service Fabric before 10.1 Cumulative Update 7.0 allows local users to elevate privileges. Microsoft has not identified the affected file-access component or disclosed how it resolves an attacker-controlled link before opening its target. Exploitation requires low local privileges, high complexity, and user interaction; success permits protected-data modification and service interruption.

CVSS severity6.0
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Link-following in Microsoft Service Fabric before 10.1 Cumulative Update 7.0 allows local users to elevate privileges. Microsoft has not identified the affected file-access component or disclosed how it resolves an attacker-controlled link before opening its target. Exploitation requires low local privileges, high complexity, and user interaction; success permits protected-data modification and service interruption.

The record

CVE
CVE-2025-21195
Published
Jul 8, 2025
Updated
Feb 13, 2026
Vendor
Microsoft
Product
Service Fabric
Classifications
CWE-59, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <10.1 Cumulative Update 7.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Service Fabricversion=1.0.0 <10.1 Cumulative Update 7.0

Published CVSS scores

6.0MicrosoftCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H
5.2MicrosoftCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H/E:U/RL:O/RC:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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