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CVE-2026-45491.NET Tampering Vulnerability
- 6.2MediumCVSS base score
- 0.39%Exploitation in 30 daysEPSS · top 67% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
Timeline
ID reserved
By microsoft
- 28 days later
· 28 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | Medium6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C |
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.39% · top 67% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.2.
Affected products
- affected 10.0.0 – < 10.0.9
- affected 8.0 – < 8.0.28
- affected 8.0.0 – < 8.0.28
- affected 9.0.0 – < 9.0.17
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- NuGetMicrosoft.NETCore.App.Runtime.linux-x64GHSA-7q4v-2mr6-5gpx (opens in a new tab)
- NuGetMicrosoft.NETCore.App.Runtime.osx-arm64GHSA-7q4v-2mr6-5gpx (opens in a new tab)
- NuGetMicrosoft.NETCore.App.Runtime.win-x64GHSA-7q4v-2mr6-5gpx (opens in a new tab)
References
References1
- .NET 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)
- EUVD EUVD-2026-35675 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-7q4v-2mr6-5gpx (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45491)Record last updated .