CWE-940Improper Verification of Source of a Communication Channel

Abstraction: Base · CVEs in our corpus: 56

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: 20 August 2026 20:22 UTC

Cumulative inbound coverage

How completely the frameworks we cross-walk collectively cover this — the verdict is the strongest single mapping (overlapping partials are not summed); breadth shows the corroboration behind it.

Collective: partial · 4 mapping(s) from 1 framework(s): CAPEC 4 (partial)

See the full cumulative-coverage rollup →

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 that address this weakness (4)AI-assisted

Control	Title	Family	Why it addresses this CWE
`SC-11`	Trusted Path	SC	Requires explicit verification of the source and integrity of the channel used for authentication and other security functions.
`SC-20`	Secure Name/Address Resolution Service (Authoritative Source)	SC	Provides the means to verify the source of name-resolution responses instead of relying on unauthenticated channels.
`SC-23`	Session Authenticity	SC	Requires explicit verification of the communication source, blocking session hijacking via spoofed or alternate channels.
`IA-9`	Service Identification and Authentication	IA	Enforces 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	9.9	9.8	0.0263	2025-10-20
`CVE-2023-41094`	7.4	10.0	0.0057	2023-10-04
`CVE-2023-41355`	7.4	9.8	0.0062	2023-11-03
`CVE-2024-40515`	7.4	9.8	0.0066	2024-07-16
`CVE-2024-38886`	7.4	9.8	0.0064	2024-08-02
`CVE-2023-48387`	6.8	8.8	0.0103	2023-12-15
`CVE-2023-3663`	6.7	8.8	0.0102	2023-08-03
`CVE-2026-2611`	6.7	9.6	0.0038	2026-05-19
`CVE-2025-59159`	6.6	9.6	0.0024	2025-10-06
`CVE-2024-40516`	6.5	8.8	0.0033	2024-07-16
`CVE-2026-33875`	6.5	9.3	0.0027	2026-03-27
`CVE-2026-35643`	6.5	8.8	0.0037	2026-04-10
`CVE-2026-48745`	6.5	9.3	0.0032	2026-06-17
`CVE-2024-26131`	6.3	8.4	0.0047	2024-02-29
`CVE-2025-23222`	6.2	8.4	0.0024	2025-01-24
`CVE-2024-49579`	6.1	8.1	0.0042	2024-10-17
`CVE-2026-40434`	6.0	8.1	0.0023	2026-04-17
`CVE-2023-51440`	5.9	7.5	0.0060	2024-02-13
`CVE-2025-13086`	5.9	7.5	0.0063	2025-12-03
`CVE-2025-40820`	5.9	7.5	0.0048	2025-12-09
`CVE-2019-25613`	5.9	7.5	0.0052	2026-03-22
`CVE-2024-1621`	5.8	7.5	0.0036	2024-09-02
`CVE-2026-44698`	5.6	8.3	0.0014	2026-05-29
`CVE-2026-44894`	5.6	7.5	0.0014	2026-06-12
`CVE-2026-6734`	5.6	7.5	0.0034	2026-06-17