CVE-2026-49169
HIGH 8 ALL-YEARSUse after free in DNS Server allows an authorized attacker to execute code over a network.
Severe if exploited (CVSS 8), but no confirmed exploitation. Patch on a normal cadence.
Exploitation likelihood
0.8%chance of exploitation in 30 days · 55th percentile
Impact if exploited
8CVSS 3.1 · HIGH · CNA
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires an admin / high-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
No public PoC is currently catalogued.
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Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Affected
Vendors Microsoft
Products Windows Server 2025 Windows Server 2025 (Server Core Installation)
Weakness (CWE)
- CWE-416: : Use After Free
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Microsoft | Windows Server 2025 | < 10.0.26100.33158 |
All CVSS metrics
- HIGH 8 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C - HIGH 8 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H - HIGH 8.8 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
Patches & mitigations
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49169 CVE record · microsoft · Updated 2026-10-08T18:12:51.406Z
NVD · CVE-2026-49169 · Updated 2026-07-16T16:13:38.843
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-43981 EUVD · EUVD-2026-43981
Sources: NVD · CVE.org · All sources and attribution · EPSS