CVE-2026-70179ASP.NET Core Elevation of Privilege Vulnerability
- 7.5HighCVSS base score
- 0.63%Exploitation in 30 daysEPSS · top 49% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
Timeline
ID reserved
By microsoft
- 2 months later
· 2 months 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 | High7.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| NVDNVD · Awaiting Analysis | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.63% · top 49% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
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
Microsoft · Microsoft.AspNetCore.Authentication.Negotiate
- affected 10.0.0 – < 10.0.13
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- NuGetMicrosoft.AspNetCore.Authentication.NegotiateGHSA-vrrp-6v32-2p8g (opens in a new tab)
References
References1
- ASP.NET Core Elevation of Privilege 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-2026-99696 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-vrrp-6v32-2p8g (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-2026-70179)Record last updated .