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CVE-2026-97801
.NET Framework Tampering Vulnerability
High7.5EPSS 0.73%
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | High7.5 | 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 |
| NVDNVD · Awaiting Analysis | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.73% · top 45% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
Microsoft · Microsoft .NET Framework 3.5
- affected 3.5.0 – < 2.0.50727.9188 AND 3.0.30729.9171
Microsoft · Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
- affected 3.0.0.0 – < 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0
Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2
- affected 4.7.0 – < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
Microsoft · Microsoft .NET Framework 3.5 AND 4.8
- affected 4.8.0 – < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0
Microsoft · Microsoft .NET Framework 3.5 AND 4.8.1
- affected 4.8.1 – < 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
Microsoft · Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
- affected 4.7.0 – < 4.7.4150.0
Microsoft · Microsoft .NET Framework 4.8
- affected 4.8.0 – < 4.8.4811.0
Microsoft · Microsoft .NET Framework 4.8.1
- affected 4.8.0.0 – < 4.8.9363.0
References (1)
- .NET Framework Tampering Vulnerability (opens in a new tab)vendor-advisorypatch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-97801)Record last updated .