Integer overflow in Microsoft .Net Framework 3.5
CVE-2026-35433
Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.007 (47.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L.
Affected products
- Microsoft .Net Framework 3.5 — versions 3.5.0
- Microsoft .Net Framework 3.5 And 4.7.2 — versions 4.7.0
- Microsoft .Net Framework 3.5 And 4.8 — versions 4.8.0
- Microsoft .Net Framework 3.5 And 4.8.1 — versions 4.8.1
- Microsoft .Net Framework 4.8 — versions 4.8.0
- Microsoft .Net
- Microsoft .Net 10.0 — versions 10.0.0
- Microsoft .Net 8.0 — versions 8.0.0
- Microsoft .Net 9.0 — versions 9.0.0
- Microsoft .Net_framework — versions 4.8, 3.5, 4.8.1
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-35433?
- CVE-2026-35433 is a high-severity vulnerability in Microsoft .Net Framework 3.5, classified under Improper Input Validation. CVSS score: 7.3/10. Published 2026-05-12.
- How severe is CVE-2026-35433?
- High severity. CVSS v3 base score is 7.3 out of 10.