CVE-2026-62787Network attack vector

Remote code execution via DNS use-after-free

Published Aug 11, 2026 · Updated Aug 25, 2026

Use-after-free in Microsoft Windows DNS before the August 2026 updates allows remote authenticated users to execute code over a network. Microsoft has not disclosed the affected function or DNS request path; public records identify only a use-after-free in the Windows DNS service, so the exact operation on attacker-controlled data remains undisclosed. Reachability requires an affected host running the DNS Server role, and Microsoft's CVSS vector sets PR:L and UI:N, bounding the published impact to authenticated network-based code execution.

CVSS severity7.5
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Microsoft Windows DNS before the August 2026 updates allows remote authenticated users to execute code over a network. Microsoft has not disclosed the affected function or DNS request path; public records identify only a use-after-free in the Windows DNS service, so the exact operation on attacker-controlled data remains undisclosed. Reachability requires an affected host running the DNS Server role, and Microsoft's CVSS vector sets PR:L and UI:N, bounding the published impact to authenticated network-based code execution.

The record

CVE
CVE-2026-62787
Published
Aug 11, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416
Attack vector
network
Privileges
authenticated

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 vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5Microsoft CorporationCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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