CVE-2026-62745

Adjacent information disclosure via integer underflow

Published Aug 11, 2026 · Updated Aug 25, 2026

Integer underflow in Windows DHCP Server in affected Microsoft Windows releases allows remote attackers to read memory contents over an adjacent network. Microsoft's CVE record maps the flaw to CWE-191 and CWE-125, indicating an arithmetic wraparound that leads to an out-of-bounds read on network-supplied DHCP data; Microsoft has not published the specific function or field involved. Exposure is limited to systems running the DHCP Server role and reachable from the local network segment, and the published impact is confidentiality only.

CVSS severityUnavailable
Unscored
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer underflow in Windows DHCP Server in affected Microsoft Windows releases allows remote attackers to read memory contents over an adjacent network. Microsoft's CVE record maps the flaw to CWE-191 and CWE-125, indicating an arithmetic wraparound that leads to an out-of-bounds read on network-supplied DHCP data; Microsoft has not published the specific function or field involved. Exposure is limited to systems running the DHCP Server role and reachable from the local network segment, and the published impact is confidentiality only.

The record

CVE
CVE-2026-62745
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

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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

6.5MicrosoftCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

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

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Your stack

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