Microsoft Exchange Server Spoofing Vulnerability

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-118208
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-10 19:19:37 UTC
Updated2026-11-12 22:18:37 UTC
DescriptionImproper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

EPSS: 0.008210000 probability, percentile 0.578670000 (date 2026-11-14)

Problem Types: CWE-15 | CWE-284 | CWE-15 CWE-15: External Control of System or Configuration Setting | CWE-284 CWE-284 Improper Access Control

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
3.1CNACVSS7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:U/RL:O/RC:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft Microsoft Exchange Server Subscription Edition RTM affected 15.02.0.0 15.02.2562.057 custom x64-based Systems

References

ReferenceSourceLinkTags
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118208 [email protected] msrc.microsoft.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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