CVE-2026-40372

Summary

Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.

Affected Software

Weaknesses

• CWE-347: CWE-347: Improper Verification of Cryptographic Signature

ADP Enrichment

CISA ADP Vulnrichment

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

ASP.NET Core: ASP.NET: ASP.NET Core: Privilege escalation via improper cryptographic signature verification

Additional References

• https://access.redhat.com/security/cve/CVE-2026-40372
• https://bugzilla.redhat.com/show_bug.cgi?id=2460224
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40372.json

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40372

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