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CVE-2026-62814 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-11T17:18:35.163Z and has not been modified since then. The CVE-2026-62814 vulnerability is an integer underflow issue in Windows DHCP Server that could allow an unauthorized attacker to disclose information over an adjacent network. The vulnerability has a CVSS score of 6.5 and is classified as medium severity. System administrators and security teams should verify the affected systems and review the official advisory for mitigation steps. Defenders should also monitor Windows DHCP Server systems for any suspicious activity that could be related to the vulnerability. The vulnerability can be particularly problematic in environments where DHCP servers are exposed to untrusted networks or are used to serve a large number of clients. Evidence is based on official CVE and NVD records.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-08-16
Advisory published
2026-08-11
Advisory updated
2026-08-16

Who should care

System administrators and security teams responsible for Windows DHCP Server systems should be aware of this vulnerability and take necessary actions to mitigate the risk. This includes reviewing the official advisory, applying patches or updates, and implementing compensating controls as needed. Additionally, security teams should monitor Windows DHCP Server systems for any suspicious activity that could be related to the vulnerability.

Technical summary

The CVE-2026-62814 vulnerability is an integer underflow issue in Windows DHCP Server that could allow an unauthorized attacker to disclose information over an adjacent network. The vulnerability has a CVSS score of 6.5 and is classified as medium severity. This type of vulnerability can be particularly problematic in environments where DHCP servers are exposed to untrusted networks or are used to serve a large number of clients.

Defensive priority

Medium-priority defensive actions are recommended due to the CVSS score of 6.5 and the potential for information disclosure over an adjacent network.

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to address the integer underflow vulnerability in Windows DHCP Server.
  • Implement compensating controls such as network segmentation to limit the potential impact of the vulnerability.
  • Monitor Windows DHCP Server systems for any suspicious activity that could be related to the vulnerability.
  • Review and update asset inventory to ensure all affected systems are accounted for.
  • Perform exposure review to identify potential vectors of attack.

Evidence notes

The CVE-2026-62814 record indicates an integer underflow vulnerability in Windows DHCP Server, which could allow an unauthorized attacker to disclose information over an adjacent network. Evidence is based on official CVE and NVD records. The vulnerability has a CVSS score of 6.5 and is classified as medium severity. System administrators and security teams should verify the affected systems and review the official advisory for mitigation steps. Defenders should also monitor Windows DHCP Server systems for any suspicious activity that could be related to the vulnerability.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-11T17:18:35.163Z and has not been modified since then.