Vulnerability in Microsoft .Net Framework 3.5
CVE-2026-32226
Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a network.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (49.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.001
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 4.6.2/4.7/4.7.1/4.7.2 — versions 4.7.0
- Microsoft .Net Framework 4.7.2 — versions 10.0.0.0
- Microsoft .Net Framework 4.8 — versions 4.8.0
- Microsoft .Net Framework 4.8.1 — versions 4.8.0.0
- Microsoft .Net Framework — versions 3.5, 4.7.2, 4.8
- Microsoft Windows 10 1607
Weakness classification (CWE)
References
- .NET Framework Denial of Service Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-32226?
- CVE-2026-32226 is a medium-severity vulnerability in Microsoft .Net Framework 3.5, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.9/10. Published 2026-04-14.
- How severe is CVE-2026-32226?
- Medium severity. CVSS v3 base score is 5.9 out of 10.