Local privilege escalation via incorrect package permissions
Published Mar 10, 2026 · Updated Mar 10, 2026
Incorrect packaging permissions in Microsoft .NET 10.0.0 through 10.0.3 allow local users to elevate privileges on Linux systems. Affected Linux runtime packages assign overly permissive default access controls; Microsoft has not identified the specific files or permission bits. Exploitation requires existing low-privileged local access and grants elevated access affecting protected data and system operations.
Summary
What happened
Incorrect packaging permissions in Microsoft .NET 10.0.0 through 10.0.3 allow local users to elevate privileges on Linux systems. Affected Linux runtime packages assign overly permissive default access controls; Microsoft has not identified the specific files or permission bits. Exploitation requires existing low-privileged local access and grants elevated access affecting protected data and system operations.
The record
- CVE
- CVE-2026-26131
- Published
- Mar 10, 2026
- Updated
- Mar 10, 2026
- Vendor
- Microsoft
- Product
- .NET 10.0
- Classifications
- CWE-276, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 10, 2026CVE publishedPublication date reported by the CVE source.
- Mar 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.0 <10.0.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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