CVE-2026-21521

Summary

Improper neutralization of escape, meta, or control sequences in Copilot allows an unauthorized attacker to disclose information over a network.

Affected Software

Weaknesses

• CWE-150: CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences

ADP Enrichment

CISA ADP Vulnrichment

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

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21521

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