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Advisory severityHigh8.8Microsoft Server

High [CVE-2026-70203] Windows Media Player Remote Code Execution Vulnerability

This high-severity Microsoft Server advisory covers CVE-2026-70203 affecting Windows Server 2012 (Server Core installation), Windows Server 2012 R2 (Server Core installation), Windows Server 2016 (Server Core installation).

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-70203 Source published Source updated

VulniPulse record published

CVE-2026-70203
Affected products & platforms
Microsoft ServerWindows Server
Open source advisory

Summary

Heap-based buffer overflow in Windows Media Player allows an unauthorized attacker to execute code over a network.

Affected products named by the advisory: Windows Server 2012; Windows Server 2012 (Server Core installation); Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); and 7 more.

Affected products named by the advisory: Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); Windows Server 2022; Windows Server 2025 (Server Core installation).

Is CVE-2026-70203 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-70203 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-70203?

Upgrade to a fixed release named by Microsoft:

  • 10.0.14393.9512
  • 10.0.17763.9245
  • 10.0.19044.7725
  • 10.0.19045.7725
  • 10.0.22631.7582
  • 10.0.26100.9445
  • 10.0.26200.9445
  • 10.0.28000.2954
  • 6.2.9200.26349
  • 6.3.9600.23397
  • 10.0.20348.5622
  • 10.0.26100.33438

Confirm against the vendor advisory before you patch.

Affected versions
  • Windows 10 Version 1607 10.0.14393.0 before 10.0.14393.9512
  • Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.9245
  • Windows 10 Version 21H2 10.0.19044.0 before 10.0.19044.7725
  • Windows 10 Version 22H2 10.0.19045.0 before 10.0.19045.7725
  • Windows 11 version 23H2 10.0.22631.0 before 10.0.22631.7582
  • Windows 11 Version 23H2 10.0.22631.0 before 10.0.22631.7582
  • Windows 11 Version 24H2 10.0.26100.0 before 10.0.26100.9445
  • Windows 11 Version 25H2 10.0.26200.0 before 10.0.26200.9445
  • Windows 11 version 26H1 10.0.28000.0 before 10.0.28000.2954
  • Windows Server 2012 6.2.9200.0 before 6.2.9200.26349
  • Windows Server 2012 (Server Core installation) 6.2.9200.0 before 6.2.9200.26349
  • Windows Server 2012 R2 6.3.9600.0 before 6.3.9600.23397

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • 10.0.14393.9512
  • 10.0.17763.9245
  • 10.0.19044.7725
  • 10.0.19045.7725
  • 10.0.22631.7582
  • 10.0.26100.9445
  • 10.0.26200.9445
  • 10.0.28000.2954
  • 6.2.9200.26349
  • 6.3.9600.23397
  • 10.0.20348.5622
  • 10.0.26100.33438

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation

Upgrade to a fixed release: 10.0.14393.9512, 10.0.17763.9245, 10.0.19044.7725, 10.0.19045.7725, 10.0.22631.7582, 10.0.26100.9445. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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