# CVE-2026-45602: Microsoft Windows DHCP Server tampering vulnerability

Source: https://junglewise.ai/threats/cve-2026-45602-microsoft-windows-dhcp-server-tampering-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-09. Updated: 2026-06-09  
License: CC BY 4.0 with a link back

CVE-2026-45602 · Severity: critical · CVSS 9.1 · Published 2026-06-09

A critical vulnerability in the Microsoft Windows DHCP Server allows an unauthorized attacker to tamper with data over the network. The DHCP Server is a vital infrastructure component that automatically assigns IP addresses and network configurations to devices on a corporate network. Successful exploitation could allow an attacker to intercept or modify network traffic, potentially leading to data theft or unauthorized access to sensitive systems.

Technologies: [Microsoft Windows DHCP Server](https://junglewise.ai/threats/technologies/windows-dhcp-server). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-45602 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-45602 being exploited in the wild.

**How severe is CVE-2026-45602?** Critical severity, with a CVSS score of 9.1, published 9 June 2026.

**Which products and versions are affected?** Microsoft Windows DHCP Server.

**Is there a fix for CVE-2026-45602?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-45602 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-45602?** Check whether you run Microsoft Windows DHCP Server. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A tampering vulnerability exists in the Microsoft Windows DHCP Server component. The flaw allows an unauthenticated attacker with network access to the DHCP server to perform unauthorized modifications. According to the CVSS vector, the attack is low complexity, requires no elevated privileges, and involves no user interaction. Successful exploitation results in high impact to both confidentiality and integrity, though availability is reportedly not affected. Microsoft has released security updates to address this issue via the MSRC Update Guide.

## Affected products

- Microsoft Windows DHCP Server

## Timeline

- 2026-06-09: advisory: Initial advisory published by Microsoft and NVD.

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45602](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45602)

## Related threats

- [Microsoft Windows DHCP Server uncontrolled resource consumption](https://junglewise.ai/threats/cve-2026-96134-uncontrolled-resource-consumption-in-windows-dhcp-server-allows)
- [Windows DHCP Server time-of-check time-of-use race condition](https://junglewise.ai/threats/cve-2026-88216-time-of-check-time-of-use-toctou-race-condition-in-windows-dhcp)
- [Microsoft Windows DHCP Server use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-72998-use-after-free-in-windows-dhcp-server-allows-an-unauthorized)
- [Windows DHCP Server out-of-bounds read](https://junglewise.ai/threats/cve-2026-119890-out-of-bounds-read-in-windows-dhcp-server-allows-an-authorized)
- [Microsoft Windows DHCP Server improper access control](https://junglewise.ai/threats/cve-2026-113773-improper-access-control-in-windows-dhcp-server-allows-an)