# CVE-2026-58627: Windows DHCP Server Denial of Service Vulnerability

Status: published. Published: 2026-07-14. Updated: 2026-11-10.

Uncontrolled resource consumption in Windows DHCP Server allows an unauthorized attacker to deny service over a network.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: microsoft) — https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58627

## Affected products and versions

- Microsoft / Windows 10 Version 1607: ≥ 10.0.14393.0; < 10.0.14393.9339 (affected, custom). Source: CNA: microsoft; platforms: 32-bit Systems, x64-based Systems
- Microsoft / Windows 10 Version 1809: ≥ 10.0.17763.0; < 10.0.17763.9020 (affected, custom). Source: CNA: microsoft; platforms: 32-bit Systems, x64-based Systems
- Microsoft / Windows Server 2012: ≥ 6.2.9200.0; < 6.2.9200.26226 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems
- Microsoft / Windows Server 2012 (Server Core installation): ≥ 6.2.9200.0; < 6.2.9200.26226 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems
- Microsoft / Windows Server 2012 R2: ≥ 6.3.9600.0; < 6.3.9600.23291 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems
- Microsoft / Windows Server 2012 R2 (Server Core installation): ≥ 6.3.9600.0; < 6.3.9600.23291 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems
- Microsoft / Windows Server 2016: ≥ 10.0.14393.0; < 10.0.14393.9339 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems
- Microsoft / Windows Server 2016 (Server Core installation): ≥ 10.0.14393.0; < 10.0.14393.9339 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems
- Microsoft / Windows Server 2019: ≥ 10.0.17763.0; < 10.0.17763.9020 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems
- Microsoft / Windows Server 2019 (Server Core installation): ≥ 10.0.17763.0; < 10.0.17763.9020 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems
- Microsoft / Windows Server 2022: ≥ 10.0.20348.0; < 10.0.20348.5386 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems
- Microsoft / Windows Server 2025: ≥ 10.0.26100.0; < 10.0.26100.33158 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems
- Microsoft / Windows Server 2025 (Server Core installation): ≥ 10.0.26100.0; < 10.0.26100.33158 (affected, custom). Source: CNA: microsoft; platforms: x64-based Systems

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C; source: CNA: microsoft

- CISA KEV: No listing in collected sources

- EPSS: 1.17% as of 2026-11-10; percentile 67.79%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-400

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58627 (CNA: microsoft; vendor-advisory, patch)

## Provenance

- CNA: microsoft: https://www.cve.org/CVERecord?id=CVE-2026-58627; retrieved 2026-11-10; source updated 2026-11-10

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-58627; retrieved 2026-11-10; source updated Not reported

Revision: 5854513af4470550b30abf15354d9973190de189e171de9388145763b3f404ab

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