Patch tracker / CVE reference / CVE-2025-21176

CVE-2025-21176

Critical severity Microsoft vulnerability, CVSS 9.8. Fixed by 19 Microsoft security updates.

Critical

Risk summary

CVSS base
9.8
EPSS exploit probability
81%
Severity
Critical

Exploitation and severity

Not in the CISA KEV catalog. EPSS exploit probability 81%. CVSS 9.8 (Critical).

This CVE is among the top 25% of tracked Microsoft CVEs by EPSS exploit probability.

What to do

High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5049614, KB5049620, KB5049622, KB5049624, KB5049688, KB5049993, KB5050013, KB5050180, KB5050181, KB5050182, KB5050183, KB5050184, KB5050185, KB5050186, KB5050187, KB5050188, KB5050416, KB5050525, KB5050526 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.

Official patch for CVE-2025-21176

Apply the Microsoft security updates below to fix CVE-2025-21176. Each KB page links to the Microsoft Update Catalog download for every affected product.

KB5049614KB5049620KB5049622KB5049624KB5049688KB5049993KB5050013KB5050180KB5050181KB5050182KB5050183KB5050184KB5050185KB5050186KB5050187KB5050188KB5050416KB5050525KB5050526

Affected products

  • Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)
  • Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10)
  • Microsoft Visual Studio 2022 version 17.6
  • PowerShell 7.5 installed on Linux
  • PowerShell 7.5 installed on MacOS
  • PowerShell 7.5 installed on Windows
  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows Server 2019

Authoritative references

NVD detailMicrosoft MSRCFIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.

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Lexicon: the terms on this page
CVE
Common Vulnerabilities and Exposures. A unique ID for one publicly known vulnerability, such as CVE-2025-1234.
KB
Microsoft Knowledge Base article. The identifier for a specific Microsoft update.
KEV
CISA Known Exploited Vulnerabilities. CVEs confirmed exploited in the wild. Fix these first.
CVSS
Common Vulnerability Scoring System. A standardized Severity score from 0 to 10.
EPSS
Exploit Prediction Scoring System. The probability a CVE will be exploited in the next 30 days.
MSRC
Microsoft Security Response Center. Microsoft's Patch Tuesday advisories and KB-to-CVE mapping.
NVD
National Vulnerability Database (NIST). Authoritative CVE metadata and CVSS scores.
Ransomware
The vulnerability is linked to known ransomware activity.