CVE-2026-65813Network attack vector

Privilege escalation via authenticated SSRF

Published Aug 11, 2026 · Updated Aug 25, 2026

Server-side request forgery in Microsoft Exchange Server allows remote authenticated users to elevate privileges over a network. Microsoft has disclosed the flaw only as SSRF and has not published the affected handler, request flow, or trusted target that performs the server-side fetch on attacker-influenced input. Reachability requires valid Exchange credentials on supported on-premises releases before 15.01.2507.072, 15.02.1544.044, 15.02.1748.049, or 15.02.2562.046, and public sources describe privilege gain but no broader integrity or availability impact.

CVSS severity6.5
Medium
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Microsoft Exchange Server allows remote authenticated users to elevate privileges over a network. Microsoft has disclosed the flaw only as SSRF and has not published the affected handler, request flow, or trusted target that performs the server-side fetch on attacker-influenced input. Reachability requires valid Exchange credentials on supported on-premises releases before 15.01.2507.072, 15.02.1544.044, 15.02.1748.049, or 15.02.2562.046, and public sources describe privilege gain but no broader integrity or availability impact.

The record

CVE
CVE-2026-65813
Published
Aug 11, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, T1068
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

6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/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 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-918Server-Side Request Forgery (SSRF)
T1068Exploitation for Privilege Escalation

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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