CVE-2026-21535

Summary

Improper access control in Microsoft Teams allows an unauthorized attacker to disclose information over a network.

Affected Software

Weaknesses

• CWE-284: CWE-284: Improper Access Control

ADP Enrichment

CISA ADP Vulnrichment

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

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21535

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