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VulnerabilityPublished Updated

CVE-2025-22939: A Command Injection

Source CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
2.6% chance of exploitation in 30 days – higher than 85% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Mar 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

AI-suggested

Immediate mitigation steps include isolating affected Adtran 411 ONT devices from untrusted networks and disabling the telnet service if possible, replacing it with more secure management protocols such as SSH. Network segmentation should be enforced to limit access to management interfaces. Monitoring network traffic for unusual telnet activity and implementing intrusion detection systems tuned to detect command injection attempts can help identify exploitation attempts. Since no patches are currently available, organizations should engage with Adtran support for firmware updates or advisories. Applying strict access control lists (ACLs) to restrict telnet access to trusted management hosts and employing multi-factor authentication where possible will reduce risk. Additionally, organizations should conduct thorough audits of ONT configurations and logs to detect signs of compromise and prepare incident response plans tailored to potential ONT exploitation scenarios.

Description

A command injection vulnerability in the telnet service of Adtran 411 ONT L80.00.0011.M2 allows attackers to escalate privileges to root and execute arbitrary commands.

References

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