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Vulnerability Intelligence

Vulnerability IntelligenceCVE-2026-21527

CVE-2026-21527

MEDIUM6.5

Microsoft Exchange Server Spoofing Vulnerability

Published Feb 10, 2026

Modified 5 days ago

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21527

https://www.cve.org/CVERecord?id=CVE-2026-21527

CVSS Analysis

CVSS v3.1

6.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

LowC:L

Integrity

LowI:L

Availability

NoneA:N

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

Weakness Type (CWE)

Other

Ecosystems

Timeline

PublishedFeb 10, 2026

ModifiedFeb 27, 2026

CVE-2026-21527 | Mondoo Vulnerability Intelligence