High MSRC-CVE-2026-97801 1 CVE

.NET Framework Tampering Vulnerability

Published Oct 13, 2026 · Updated Oct 13, 2026

Vendor: Microsoft

Summary

Impact: Tampering. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

Security updates
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 — https://support.microsoft.com/help/5127689
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 — https://support.microsoft.com/help/5127690
4.8.9363.0 — https://support.microsoft.com/help/5127691
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 — https://support.microsoft.com/help/5127692
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 — https://support.microsoft.com/help/5127693
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.10008.0 — https://support.microsoft.com/help/5127694
2.0.50727.9188 AND 3.0.30729.9171 — https://support.microsoft.com/help/5127696
2.0.50727.8987 AND 3.0.30729.8982 — https://support.microsoft.com/help/5127660
2.0.50727.8987 AND 3.0.30729.8982 — https://support.microsoft.com/help/5127664
2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 — https://support.microsoft.com/help/5126868
2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 — https://support.microsoft.com/help/5127666
2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 — https://support.microsoft.com/help/5127685
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0 — https://support.microsoft.com/help/5127683
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0 — https://support.microsoft.com/help/5127687
4.7.4150.0 — https://support.microsoft.com/help/5127667
4.7.4150.0 — https://support.microsoft.com/help/5127668
4.8.4811.0 — https://support.microsoft.com/help/5127684
4.8.4811.0 — https://support.microsoft.com/help/5127686
4.8.4811.0 — https://support.microsoft.com/help/5127688

Vulnerabilities 1

High 7.5

CVE-2026-97801

.NET Framework Tampering Vulnerability

Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.

Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 Microsoft .NET Framework 3.5 AND 4.8 Microsoft .NET Framework 3.5 AND 4.7.2

Oct 13, 2026

Revision history

2026-10-13 #1
Information published.

References

CVE-2026-97801 .NET Framework Tampering Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97801
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss