CVE-2026-62886: .NET Elevation of Privilege Vulnerability
Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.
CSIRTS triage
- What
- Integer overflow in .NET runtime allows unauthorized local privilege escalation.
- Who is affected
- Unauthorized local users running .NET applications on affected systems.
- Urgency
- High severity; privilege escalation without prior authentication is critical.
- Action
- Update .NET runtime and Framework to the latest patched version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62886
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-628860.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 33% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-62886 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[NEW] [high] Microsoft Developer Tools: Multiple Vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Microsoft .Net (August 12, 2026)cert-fr-avis
- unknownMultiple vulnerabilities in Microsoft products (August 12, 2026)cert-fr-avis
- unknownNCSC-2026-0285 [1.00] [M/H] Vulnerabilities patched in Microsoft Developer Toolsncsc-nl
- highGHSA-jqhp-238x-qhgf: Microsoft Security Advisory CVE-2026-62886 – .NET Elevation of Privilege Vulnerabilityghsa
- highCVE-2026-62886: Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges l…nvd
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