CVE-2026-62897: .NET Framework Remote Code Execution Vulnerability
Integer overflow or wraparound in .NET Framework allows an unauthorized attacker to execute code locally.
CSIRTS triage
- What
- Integer overflow in .NET Framework allows local code execution.
- Who is affected
- Systems running vulnerable .NET Framework versions with untrusted code or input.
- Urgency
- High severity (CVSS 7.0); not yet exploited but RCE capability requires urgent patching.
- Action
- Apply the latest .NET Framework security update from Microsoft.
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-2026-62897
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-2026-628970.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-62897 | 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-fx4q-gjrx-2jw6: Microsoft Security Advisory CVE-2026-62897 – .NET Remote Code Execution Vulnerabilityghsa
- highCVE-2026-62897: Integer overflow or wraparound in .NET Framework allows an unauthorized attacker to execute co…nvd
Recent advisories for .NET Framework Remote
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-50646: .NET Framework Remote Code Execution Vulnerabilitymsrc · 2026-07-14
- criticalexploitedCVE-2020-1147: Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerabilitycisa-kev · 2021-11-03
- criticalexploitedCVE-2020-0646: Microsoft .NET Framework Remote Code Execution Vulnerabilitycisa-kev · 2021-11-03
- criticalexploitedCVE-2017-8759: Microsoft .NET Framework Remote Code Execution Vulnerabilitycisa-kev · 2021-11-03
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