Security Resilience

CWE · MITRE source

CWE-940Improper Verification of Source of a Communication Channel

Abstraction: Base · CVEs in our corpus: 66

The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin.

When an attacker can successfully establish a communication channel from an untrusted origin, the attacker may be able to gain privileges and access unexpected functionality.

Last updated: 14 October 2026 20:41 UTC

OWASP Top 10 for Web (2025)

This weakness contributes to A07:2025 Authentication Failures.

Control responseHuman-reviewed

Answering this weakness across the control lifecycle, from our framework cross-walks.

Prevent
Stop it (NIST 800-53 / CSF Protect)
  • SC-11 Trusted Path
  • SC-20 Secure Name/Address Resolution Service (Authoritative Source)
  • SC-23 Session Authenticity
  • IA-9 Service Identification and Authentication
Detect
Catch it (CSF Detect / Respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V3.5.3
  • V10.6.2
  • V15.2.4

NIST 800-53 r5 controls PROPOSED for this weakness (4)AI-assisted

These are model PROPOSALS, not graded mappings. They come from controls_to_cwe_proposals, which carries no grade field at all; across the CWE pages 1,540 of 1,722 such associations (89%) have never been graded by anything. The heading said “address” until 2026-09-29, which asserted a relationship the data does not carry. Graded cross-walks are on the framework map, not here.

Control Title Family Why it addresses this CWE
SC-11Trusted PathSCRequires explicit verification of the source and integrity of the channel used for authentication and other security functions.
SC-20Secure Name/Address Resolution Service (Authoritative Source)SCProvides the means to verify the source of name-resolution responses instead of relying on unauthenticated channels.
SC-23Session AuthenticitySCRequires explicit verification of the communication source, blocking session hijacking via spoofed or alternate channels.
IA-9Service Identification and AuthenticationIAEnforces verification of the source of a communication channel by requiring identification and authentication of services first.

Top CVEs of this weakness type, ranked by Risk Priority

CVE Risk CVSS EPSS Published
CVE-2025-61932 KEV 9.99.80.02772025-10-20
CVE-2023-41094 7.510.00.00692023-10-04
CVE-2023-41355 7.49.80.00622023-11-03
CVE-2024-40515 7.49.80.00662024-07-16
CVE-2024-38886 7.49.80.00652024-08-02
CVE-2023-48387 6.88.80.01032023-12-15
CVE-2023-3663 6.78.80.01022023-08-03
CVE-2026-2611 6.79.60.00412026-05-19
CVE-2026-850856.79.60.00392026-09-04
CVE-2025-59159 6.69.60.00252025-10-06
CVE-2026-338756.69.30.00472026-03-27
CVE-2026-356436.68.80.00542026-04-10
CVE-2026-487456.69.30.00412026-06-17
CVE-2026-78685 6.68.80.00632026-08-25
CVE-2024-40516 6.58.80.00332024-07-16
CVE-2026-891786.58.80.00362026-09-11
CVE-2024-26131 6.38.40.00472024-02-29
CVE-2025-23222 6.28.40.00242025-01-24
CVE-2024-49579 6.18.10.00452024-10-17
CVE-2026-40434 6.18.10.00372026-04-17
CVE-2023-51440 5.97.50.00602024-02-13
CVE-2025-13086 5.97.50.00642025-12-03
CVE-2025-40820 5.97.50.00492025-12-09
CVE-2019-25613 5.97.50.00522026-03-22
CVE-2024-1621 5.87.50.00362024-09-02