Microsoft ships emergency .NET fixes for critical Brotli buffer overflow
CVE-2026-111497, scored 9.2, can disclose information, crash the process, or elevate privilege.
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Vulnerability1 · 1 read
CVE-2026-114148
Incorrect default permissions enable local privilege escalation in ASP.NET Core
- CVSS 3.1
- 7.8 high
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
ASP.NET Core uses incorrect default permissions. An authorized attacker who already has local, low-privilege access can raise privileges without user interaction. Successful exploitation yields high impact to confidentiality, integrity, and availability on the host. Microsoft has not listed affected builds or fixed versions for this issue.
What to do: Apply Microsoft's update for CVE-2026-114148. No workaround is stated.
| Product | Affected |
|---|---|
| Microsoft ASP.NET Core | — |
Estimated exposure
No basis for an estimate.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
Incorrect default permissions in ASP.NET Core allows an authorized attacker to elevate privileges locally.
- Weakness
- CWE-276
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
In the news
3 storiesMicrosoft issues emergency .NET fixes for four vulnerabilities
Patched builds are .NET 8.0.33, 9.0.22, 10.0.14, and .NET 11 Release Candidate 3, including a Brotli buffer overflow.
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Microsoft ships out-of-band .NET fixes for Brotli and Linux tarball flaws
Patched builds are .NET 8.0.33, 9.0.22, 10.0.14, and .NET 11 Release Candidate 3; .NET Framework is not affected.
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