CVE-2026-62871: .NET Elevation of Privilege Vulnerability
Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.
CSIRTS triage
- What
- An out-of-bounds write in .NET allows unauthorized attackers to execute code locally.
- Who is affected
- All systems running affected .NET versions are exposed to local code execution.
- Urgency
- High severity (CVSS 7.8) with local code execution capability; remediation should be prioritized despite no known exploitation.
- Action
- Apply the latest .NET security patches immediately.
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-2026-62871
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-2026-628710.40% 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-2026-62871 | 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
- unknownNCSC-2026-0285 [1.00] [M/H] Vulnerabilities patched in Microsoft Developer Toolsncsc-nl
- highGHSA-vg44-h755-9hw7: Microsoft Security Advisory CVE-2026-62871 – .NET Elevation of Privilege Vulnerabilityghsa
- highCVE-2026-62871: Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.nvd
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