CVE-2026-62909
HIGH 7.8Uncaught exception in .NET allows an authorized attacker to elevate privileges locally.
ELEVATED IMPACT
Severe if exploited (CVSS 7.8), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.3%chance of exploitation in 30 days · 21st percentile
○ In CISA KEV
○ Public exploit / PoC
Impact if exploited
7.8CVSS 3.1 · HIGH
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ⚠Access: Requires local access to the host
- ⚠Privileges: Requires a low-privilege account
- ✓User interaction: No user interaction needed
- ⚠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-2026-62909/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-2026-62909/poc.json
Affected
Products .Net 10.0 .Net 8.0 .Net 9.0 Microsoft Visual Studio 2022 Version 17.14 Microsoft Visual Studio 2026 Version 18.8 Visual Studio 2022 Visual Studio 2026 .Net Macos Linux Kernel Windows
Weakness (CWE)
- CWE-252: : Unchecked Return Value
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| 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 |
All CVSS metrics
- HIGH 7.8 v3.1 · CNA Primary
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C - HIGH 7.8 v3.1 · NVD Secondary
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H