Adjacent information disclosure via integer underflow
Published Aug 11, 2026 · Updated Aug 25, 2026
Integer underflow in Microsoft Windows DHCP Server allows attackers to disclose server memory from an adjacent network. An internal integer wraps and causes an out-of-bounds read, but Microsoft has not disclosed the affected routine or attacker-controlled field. Exploitation requires adjacent-network access and no authentication; the published impact is limited to information disclosure.
Summary
What happened
Integer underflow in Microsoft Windows DHCP Server allows attackers to disclose server memory from an adjacent network. An internal integer wraps and causes an out-of-bounds read, but Microsoft has not disclosed the affected routine or attacker-controlled field. Exploitation requires adjacent-network access and no authentication; the published impact is limited to information disclosure.
The record
- CVE
- CVE-2026-62718
- 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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