CVE-2022-38394Network attack vector

Unauthenticated OS command execution via hard-coded Telnet credentials

Published Sep 8, 2022 · Updated Aug 3, 2024

Hard-coded credentials in the Telnet server of Allied Telesis CentreCOM AR260S V2 before 3.3.7 allow remote attackers to execute OS commands. The Telnet authentication routine accepts credentials embedded in the firmware, granting command execution without a user-created account. Telnet must be enabled, an unsupported maintenance-only configuration that is disabled by default; the firewall is enabled by default.

CVSS severity9.8
Critical
EPSS probability1.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in the Telnet server of Allied Telesis CentreCOM AR260S V2 before 3.3.7 allow remote attackers to execute OS commands. The Telnet authentication routine accepts credentials embedded in the firmware, granting command execution without a user-created account. Telnet must be enabled, an unsupported maintenance-only configuration that is disabled by default; the firewall is enabled by default.

The record

CVE
CVE-2022-38394
Published
Sep 8, 2022
Updated
Aug 3, 2024
Vendor
Allied Telesis K.K.
Product
CentreCOM AR260S V2
Classifications
CWE-798, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=firmware versions prior to Ver.3.3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Allied Telesis K.K. · CentreCOM AR260S V2version=firmware versions prior to Ver.3.3.7

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3JPCERT/CC and IPAAV:N/AC:M/Au:N/C:C/I:C/A:C
8.1JPCERT/CC and IPACVSS:3.0/AV:N/AC:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078.001Default Accounts

Public exploit references

No public exploit references are available in this record.

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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