CVE-2026-54998

Summary

Incorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.

Affected Software

Weaknesses

• CWE-863: CWE-863: Incorrect Authorization

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54998

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