Microsoft .net Framework 4.8.1 vulnerabilities

15 CVEs affecting Microsoft .net Framework 4.8.1, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-97801, published 2026-10-13.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2026-83520, published 2026-10-13. High severity, CVSS 8.8. EPSS: 1.3% chance of exploitation in the next 30 days. Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.
• CVE-2026-70035, published 2026-10-13. High severity, CVSS 8.8. EPSS: 1.3% chance of exploitation in the next 30 days. Deserialization of untrusted data in .NET Framework allows an unauthorized attacker to execute code over a network.
• CVE-2026-69651, published 2026-10-13. High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days. Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.
• CVE-2026-58280, published 2026-10-13. High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days. Uncontrolled recursion in .NET allows an unauthorized attacker to deny service over a network.
• CVE-2026-69522, published 2026-09-08. High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days. Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.
• CVE-2026-70174, published 2026-10-13. High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days. Improperly implemented security check for standard in .NET allows an unauthorized attacker to execute code over a network.
• CVE-2026-96233, published 2026-10-13. High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days. Out-of-bounds write in ASP.NET Core allows an unauthorized attacker to deny service over a network.
• CVE-2026-84008, published 2026-10-13. High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days. Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.
• CVE-2026-96224, published 2026-10-13. High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days. Out-of-bounds write in .NET allows an unauthorized attacker to execute code over a network.
• CVE-2026-85363, published 2026-10-13. High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days. Integer overflow or wraparound in .NET Framework allows an unauthorized attacker to elevate privileges over a network.

Latest

• CVE-2026-97801, published 2026-10-13. High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days. Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.
• CVE-2026-96222, published 2026-10-13. High severity, CVSS 7.4. EPSS: 0.6% chance of exploitation in the next 30 days. Improper certificate validation in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.
• CVE-2026-70007, published 2026-10-13. High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days. Out-of-bounds write in .NET Framework allows an unauthorized attacker to execute code over a network.