CVE-2026-21527

Summary

User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Affected Software

VendorProductVersion RangeStatus
MicrosoftMicrosoft Exchange Server 2016 Cumulative Update 2315.01.0.0 < 15.01.2507.066affected
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 1415.02.0.0 < 15.02.1544.039affected
MicrosoftMicrosoft Exchange Server 2019 Cumulative Update 1515.02.0.0 < 15.02.1748.043affected
MicrosoftMicrosoft Exchange Server Subscription Edition RTM15.02.0.0 < 15.02.2562.037affected

Weaknesses

  • CWE-451: CWE-451: User Interface (UI) Misrepresentation of Critical Information
  • CWE-345: CWE-345: Insufficient Verification of Data Authenticity
  • CWE-1286: CWE-1286: Improper Validation of Syntactic Correctness of Input

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References