CVE-2025-22938Public exploitNetwork attack vector

Unauthorized management access via default credentials

Published Mar 31, 2025 · Updated Aug 18, 2025

Use of default passwords in Adtran 411 ONT L80.00.0011.M2 allows remote attackers to access its Telnet and HTTP interfaces. The firmware assigns guessable user:user and support:support credentials to root-group accounts, stores their MD5 hashes in /etc/passwd, and accepts them at the Telnet interface. An attacker able to reach the management address can enter the restricted shell or web interface without a previously established account; separate command-injection and privilege flaws are tracked independently.

CVSS severity9.8
Critical
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of default passwords in Adtran 411 ONT L80.00.0011.M2 allows remote attackers to access its Telnet and HTTP interfaces. The firmware assigns guessable user:user and support:support credentials to root-group accounts, stores their MD5 hashes in /etc/passwd, and accepts them at the Telnet interface. An attacker able to reach the management address can enter the restricted shell or web interface without a previously established account; separate command-injection and privilege flaws are tracked independently.

The record

CVE
CVE-2025-22938
Published
Mar 31, 2025
Updated
Aug 18, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1393, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1393Use of Default Password
T1078.001Default Accounts

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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