CVE-2026-62897
HIGH 7Integer overflow or wraparound in .NET Framework allows an unauthorized attacker to execute code locally.
Severe if exploited (CVSS 7), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.3%chance of exploitation in 30 days · 26th percentile
Impact if exploited
7CVSS 3.1 · HIGH
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ⚠Access: Requires local access to the host
- ✓Privileges: No account or privileges required
- ⚠User interaction: A user must take an action (click / open a file)
- ⚠Complexity: Needs a race window or specific setup
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept & exploit code
- github-search Search GitHub for public PoC repos
Test against your own equipment
curl -s https://vulnpedia.com/cve/CVE-2026-62897/poc.jsonMachine-readable PoC index for this CVE (for automation).Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-62897/poc.json
Affected
Vendors Microsoft
Products .Net 10.0 .Net 8.0 .Net 9.0 Microsoft .Net Framework 3.5 Microsoft .Net Framework 3.5 And 4.7.2 Microsoft .Net Framework 3.5 And 4.8 Microsoft .Net Framework 4.8.1 Microsoft Visual Studio 2022 Version 17.14 Microsoft Visual Studio 2026 Version 18.8 .Net Framework Windows 11 26h1 Windows 10 1809
Weakness (CWE)
- CWE-190: : Integer Overflow or Wraparound
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Microsoft | .Net Framework | 3.5 |
| Microsoft | .Net Framework | 3.5 |
| Microsoft | .Net Framework | 4.7.2 |
| Microsoft | Visual Studio 2022 | ≥ 17.14.0 and < 17.14.38 |
| Microsoft | Visual Studio 2026 | ≥ 18.8.0 and < 18.8.3 |
| Microsoft | .Net | ≥ 8.0.0 and < 8.0.30 |
| Microsoft | .Net | ≥ 9.0.0 and < 9.0.19 |
| Microsoft | .Net | ≥ 10.0.0 and < 10.0.11 |
| Microsoft | .Net Framework | 4.8.1 |
| Microsoft | .Net Framework | 3.5 |
| Microsoft | .Net Framework | 4.8 |
All CVSS metrics
- HIGH 7 v3.1 · CNA Primary
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - HIGH 7 v3.1 · NVD Secondary
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H