- 8.8HighCVSS base score
- 0.84%Exploitation in 30 daysEPSS · top 42% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.
Timeline
ID reserved
By microsoft
- 35 days later
· 35 days later
Published
- 28 days later
· 28 days 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 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| NVDNVD · Undergoing Analysis | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.84% · top 42% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected 10.0.0 – < 10.0.13
- affected 11.0.0 – < 11.0.0-rc.2
- affected 8.0.0 – < 8.0.32
- affected 9.0.0 – < 9.0.21
Microsoft · Microsoft Visual Studio 2022 version 17.14
- affected 17.14.0 – < 17.14.42
Microsoft · Microsoft Visual Studio 2026 version 18.10
- affected 18.10.0 – < 18.10.4
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- NuGetMicrosoft.WindowsDesktop.App.Runtime.win-arm64GHSA-c27m-942f-rcfh (opens in a new tab)
- NuGetMicrosoft.WindowsDesktop.App.Runtime.win-x64GHSA-c27m-942f-rcfh (opens in a new tab)
- NuGetMicrosoft.WindowsDesktop.App.Runtime.win-x86GHSA-c27m-942f-rcfh (opens in a new tab)
References
References1
- .NET Remote Code Execution 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-2026-99638 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-c27m-942f-rcfh (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-2026-87697)Record last updated .