Information disclosure via DHCP integer underflow
Published Aug 11, 2026 · Updated Aug 25, 2026
Information disclosure in Windows DHCP Server before August 2026 updates allows attackers to read sensitive memory via adjacent-network DHCP traffic. Microsoft has disclosed only that Windows DHCP Server performs an integer-underflowed calculation that results in an out-of-bounds read; the affected code path and DHCP field are not public. Reachability is limited to systems on the same network segment that can send DHCP traffic to a server-role instance, and the published impact is confidentiality only.
Summary
What happened
Information disclosure in Windows DHCP Server before August 2026 updates allows attackers to read sensitive memory via adjacent-network DHCP traffic. Microsoft has disclosed only that Windows DHCP Server performs an integer-underflowed calculation that results in an out-of-bounds read; the affected code path and DHCP field are not public. Reachability is limited to systems on the same network segment that can send DHCP traffic to a server-role instance, and the published impact is confidentiality only.
The record
- CVE
- CVE-2026-62716
- Published
- Aug 11, 2026
- Updated
- Aug 25, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-125, CWE-191
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 11, 2026CVE publishedPublication date reported by the CVE source.
- Aug 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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