What is the CVSS score of CVE-2025-22940?

CVE-2025-22940 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.3%.

Which versions of 411 Firmware are affected by CVE-2025-22940?

Organizations using Incorrect access control in Adtran 411 ONT L80.00.0011.M2 face critical risk from CVE-2025-22940, a improper access control vulnerability rated CVSS 9.1.

Is there a public PoC exploit available for CVE-2025-22940?

Yes, a public proof-of-concept exploit is available for CVE-2025-22940. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2025-22940?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Monitor vendor channels for patch availability.

411 Firmware CVE-2025-22940

CRITICAL

Improper Access Control (CWE-284)

2025-03-31 cve@mitre.org

Authentication Bypass 411 Firmware

9.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.1 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:34 vuln.today

PoC Detected

Aug 18, 2025 - 17:15 vuln.today

Public exploit code

CVE Published

Mar 31, 2025 - 15:15 nvd

CRITICAL 9.1

DescriptionCVE.org

Incorrect access control in Adtran 411 ONT L80.00.0011.M2 allows unauthorized attackers to arbitrarily set the admin password.

AnalysisAI

Incorrect access control in Adtran 411 ONT L80.00.0011.M2 allows unauthorized attackers to arbitrarily set the admin password. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-284. Incorrect access control in Adtran 411 ONT L80.00.0011.M2 allows unauthorized attackers to arbitrarily set the admin password. Affected products include: Adtran 411 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

CVE-2025-22940 vulnerability details – vuln.today

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411 Firmware CVE-2025-22940

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code