CVE-2026-62814

Information disclosure via DHCP integer underflow

Published Aug 11, 2026 · Updated Aug 25, 2026

Information disclosure in Windows DHCP Server in Microsoft Windows allows adjacent remote attackers to read process memory on affected hosts. Microsoft has disclosed only that an integer underflow in DHCP Server causes an out-of-bounds read; no public advisory, CVE record, or patch diff names the vulnerable function or the specific DHCP field used in the arithmetic error. Reachability is limited to attackers on the same local network segment that can send DHCP traffic to the server, and published scoring bounds the impact to confidentiality rather than code execution or service interruption.

CVSS severity6.5
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Windows DHCP Server in Microsoft Windows allows adjacent remote attackers to read process memory on affected hosts. Microsoft has disclosed only that an integer underflow in DHCP Server causes an out-of-bounds read; no public advisory, CVE record, or patch diff names the vulnerable function or the specific DHCP field used in the arithmetic error. Reachability is limited to attackers on the same local network segment that can send DHCP traffic to the server, and published scoring bounds the impact to confidentiality rather than code execution or service interruption.

The record

CVE
CVE-2026-62814
Published
Aug 11, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-191, CWE-125
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5Microsoft CorporationCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)
CWE-125Out-of-bounds Read

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo