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CVE-2026-65813

Microsoft Exchange Server Elevation of Privilege Vulnerability

HIGH
8.8
CVSS Score
Published: August 11, 2026 at 05:05 PM UTC
Updated: October 21, 2026 at 08:52 PM UTC
2 products affected across 1 vendorExchange ServerExchange Server Subscription Edition

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Severity
HIGH8.8
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

Description

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Exchange Server· Microsoft
95%
15.01.0.015.02.0.020162016 cumulative_update_12016 cumulative_update_102016 cumulative_update_112016 cumulative_update_122016 cumulative_update_132016 cumulative_update_142016 cumulative_update_152016 cumulative_update_162016 cumulative_update_172016 cumulative_update_182016 cumulative_update_192016 cumulative_update_22016 cumulative_update_202016 cumulative_update_212016 cumulative_update_222016 cumulative_update_32016 cumulative_update_42016 cumulative_update_52016 cumulative_update_62016 cumulative_update_72016 cumulative_update_82016 cumulative_update_920192019 cumulative_update_12019 cumulative_update_102019 cumulative_update_112019 cumulative_update_122019 cumulative_update_132019 cumulative_update_22019 cumulative_update_32019 cumulative_update_42019 cumulative_update_52019 cumulative_update_62019 cumulative_update_72019 cumulative_update_82019 cumulative_update_9
Affected range stops below 15.01.2507.072, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.1544.044, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.1748.049, so it looks safe — our inference, not a vendor statement
Exchange Server Subscription Edition· Microsoft
95%
v < 15.02.2562.046*15.02.0.0
Affected range stops below 15.02.2562.046, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65813

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-918

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