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CVE record · CVE-2026-97801

.NET Framework Tampering Vulnerability

CVSS 7.5 HighEPSS 0.0073 · 54th percentile

Published by the CVE Program (CNA: microsoft) at 13 Oct 2026, 19:01 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Microsoft Microsoft .NET Framework 3.5
  • affected 3.5.0 to before 2.0.50727.9188 AND 3.0.30729.9171 custom
Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
  • affected 3.0.0.0 to before 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 custom
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2
  • affected 4.7.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 custom
Microsoft Microsoft .NET Framework 3.5 AND 4.8
  • affected 4.8.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 custom
Microsoft Microsoft .NET Framework 3.5 AND 4.8.1
  • affected 4.8.1 to before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 custom
Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
  • affected 4.7.0 to before 4.7.4150.0 custom
Microsoft Microsoft .NET Framework 4.8
  • affected 4.8.0 to before 4.8.4811.0 custom
Microsoft Microsoft .NET Framework 4.8.1
  • affected 4.8.0.0 to before 4.8.9363.0 custom
Identifiers
CVE-2026-97801
CNA
microsoft
Weakness (CWE)
CWE-1287
Tags
Published
13 Oct 2026
Updated
31 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C CNA (microsoft)
  • CISA KEV Not listed.
  • EPSS 0.0073, the 54th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 13 Oct 2026, 19:01 UTC Confirmed by the CVE List
  2. 31 Oct 2026, 16:31 UTC First seen by agentprime

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.