CVE-2026-62901: .NET Denial of Service Vulnerability
Unchecked input for loop condition in .NET allows an unauthorized attacker to deny service over a network.
CSIRTS triage
- What
- Unchecked loop input condition in .NET allows denial of service over the network.
- Who is affected
- Network-facing .NET applications and services.
- Urgency
- High severity (CVSS 7.5); not exploited but easy DoS attack surface requires urgent patching.
- Action
- Update .NET to the patched version provided by 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-2026-62901
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.
- Moderate exploitation riskCVE-2026-629011.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 62% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-62901 | 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-m93f-wj8c-rp8p: Microsoft Security Advisory CVE-2026-62901 – .NET Denial of Service Vulnerabilityghsa
- highCVE-2026-62901: Unchecked input for loop condition in .NET allows an unauthorized attacker to deny service ove…nvd
Recent advisories for .NET Denial of
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.
- highGHSA-m93f-wj8c-rp8p: Microsoft Security Advisory CVE-2026-62901 – .NET Denial of Service Vulnerabilityghsa · 2026-08-11
- unknownCVE-2026-20715: Improper input validation in some firmware for some Intel(R) Active Management Technology (Int…nvd · 2026-08-11
- highGHSA-6588-8gv4-xfgh: Microsoft Security Advisory CVE-2026-32203 – .NET and Visual Studio Denial of Service Vul…ghsa · 2026-07-28
- highGHSA-j8gr-8fp3-5q5h: Microsoft Security Advisory CVE-2026-56170 – .NET Denial of Service Vulnerabilityghsa · 2026-07-21
- highGHSA-mmjf-rqrv-855v: Microsoft Security Advisory CVE-2026-50527 – .NET Denial of Service Vulnerabilityghsa · 2026-07-21
- highGHSA-wp74-jgxh-gv4q: Microsoft Security Advisory CVE-2026-50651 – .NET Denial of Service Vulnerabilityghsa · 2026-07-20
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