Local privilege escalation via integer overflow
Published Aug 11, 2026 · Updated Aug 25, 2026
Integer overflow in Microsoft .NET before 8.0.30, 9.0.19, and 10.0.11 allows attackers to elevate privileges locally. Microsoft's public records do not identify the affected subsystem or arithmetic site, disclosing only that an integer calculation in .NET can overflow or wrap. The Microsoft CVSS vector shows a local attack with no prior privileges but required user interaction, so triage centers on systems where untrusted local users or files can reach the vulnerable code path.
Summary
What happened
Integer overflow in Microsoft .NET before 8.0.30, 9.0.19, and 10.0.11 allows attackers to elevate privileges locally. Microsoft's public records do not identify the affected subsystem or arithmetic site, disclosing only that an integer calculation in .NET can overflow or wrap. The Microsoft CVSS vector shows a local attack with no prior privileges but required user interaction, so triage centers on systems where untrusted local users or files can reach the vulnerable code path.
The record
- CVE
- CVE-2026-58641
- Published
- Aug 11, 2026
- Updated
- Aug 25, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-190, T1068
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 11, 2026CVE publishedPublication date reported by the CVE source.
- Aug 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
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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