Information disclosure via DHCP integer underflow
Published Aug 11, 2026 · Updated Aug 25, 2026
Integer underflow in Microsoft Windows DHCP Server allows remote attackers to disclose memory from an adjacent network via crafted DHCP traffic. Microsoft identifies a resulting out-of-bounds read in the DHCP Server but has not published the affected routine, input field, or precise calculation. No credentials or user interaction are required, but the attacker must reach the server from an adjacent network; the bounded impact is memory disclosure.
Summary
What happened
Integer underflow in Microsoft Windows DHCP Server allows remote attackers to disclose memory from an adjacent network via crafted DHCP traffic. Microsoft identifies a resulting out-of-bounds read in the DHCP Server but has not published the affected routine, input field, or precise calculation. No credentials or user interaction are required, but the attacker must reach the server from an adjacent network; the bounded impact is memory disclosure.
The record
- CVE
- CVE-2026-62715
- Published
- Aug 11, 2026
- Updated
- Aug 25, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-191, CWE-125, T1210
- 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
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.9121
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.
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Technologies
Your stack
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Your stack
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