Microsoft .NET Framework 3.5 vulnerability

Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.

Published 11 Aug 2026Updated 21 Oct 20261 sources
CVSS 7.8

What happened

Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.

Affected versions

Microsoft .NET Framework 3.5: 3.5.0 through before 2.0.50727.8987 AND 3.0.30729.8982 (custom); 3.0.0.0 through before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 (custom); 4.7.0 through before 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4145.0 (custom); 4.8.0 through before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 (custom); 4.8.1 through before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 (custom); 4.7.0 through before 4.7.4145.0 (custom); 4.8.0 through before 4.8.4806.0 (custom); 4.8.0.0 through before 4.8.9347.0 (custom); 18.0 through before 18.8.3 (custom) Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

  • Apply vendor-provided updates or mitigations.
  • Review affected product exposure and access logs.

Public PoC references

No public PoC reference has passed the current publication threshold.