How severe is CVE-2025-40805?

CVE-2025-40805 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-40805 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-40805?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-40805 have an EU (EUVD) identifier?

Yes. CVE-2025-40805 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2362.

When was CVE-2025-40805 published?

CVE-2025-40805 was published on 2026-01-13 and last updated on 2026-06-17.

CVE-2025-40805

CVE-2025-40805 is a critical-severity vulnerability with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
CVSS v4: 10.0
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2362
Weakness: CWE-639
Published: 2026-01-13
Last modified: 2026-06-17

Description

Affected devices do not properly enforce user authentication on specific API endpoints. This could facilitate an unauthenticated remote attacker to circumvent authentication and impersonate a legitimate user. Successful exploitation requires that the attacker has learned the identity of a legitimate user.

Frequently asked questions

What is CVE-2025-40805?: Affected devices do not properly enforce user authentication on specific API endpoints. This could facilitate an unauthenticated remote attacker to circumvent authentication and impersonate a legitimate user. Successful exploitation requires that the attacker has learned the identity of a legitimate user.
How severe is CVE-2025-40805?: CVE-2025-40805 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-40805 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-40805?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-40805 have an EU (EUVD) identifier?: Yes. CVE-2025-40805 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2362.
When was CVE-2025-40805 published?: CVE-2025-40805 was published on 2026-01-13 and last updated on 2026-06-17.

References

Other CWE-639 (Authorization Bypass Through User-Controlled Key (IDOR)) vulnerabilities

CVE-2024-45032 — Critical (CVSS 10.0): A vulnerability has been identified in Industrial Edge Management Pro (All versions < V1.9.5), Industrial Edge…
CVE-2026-62283 — Critical (CVSS 9.9): Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. Nezha versions 1.14.13…
CVE-2026-73656 — Critical (CVSS 9.9): Trigger.dev is a platform for building and deploying fully managed AI agents and workflows. Prior to 4.5.6, POST…
CVE-2026-48765 — Critical (CVSS 9.9): TypeBot is a chatbot builder tool. Versions prior to 3.17.0 allow a low-privilege read collaborator to extract a…
CVE-2026-67622 — Critical (CVSS 9.9): Flowise through 3.1.4 contains an insecure direct object reference vulnerability in the OpenAI Assistants integration…
CVE-2026-54052 — Critical (CVSS 9.9): n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations.…

Browse all CWE-639 (Authorization Bypass Through User-Controlled Key (IDOR)) vulnerabilities →