Unauthenticated network data tampering
Published Jun 9, 2026 · Updated Jun 9, 2026
Improper input handling in Microsoft Windows DHCP Server allows remote attackers to alter data through crafted network traffic. Microsoft identifies acceptance of extraneous untrusted data but has not disclosed the affected routine, field, or parsing operation. Exploitation requires no authentication or user interaction and can expose or modify data, while the published assessment reports no service interruption.
Summary
What happened
Improper input handling in Microsoft Windows DHCP Server allows remote attackers to alter data through crafted network traffic. Microsoft identifies acceptance of extraneous untrusted data but has not disclosed the affected routine, field, or parsing operation. Exploitation requires no authentication or user interaction and can expose or modify data, while the published assessment reports no service interruption.
The record
- CVE
- CVE-2026-45602
- Published
- Jun 9, 2026
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-229, CWE-349, T1565.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 9, 2026CVE publishedPublication date reported by the CVE source.
- Jun 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.8880
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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