CVE-2023-37057Public exploitNetwork attack vector

Unauthenticated root code execution via Telnet enablement

Published Jun 17, 2024 · Updated Jul 9, 2026

Authentication bypass in Jlink AX1800 1.0 allows remote attackers to execute arbitrary code through an unauthenticated router API. The web management interface accepts an unauthenticated POST to /web/um_telnet_set.cgi, enabling Telnet with known administrative credentials. Network access to the management interface is sufficient to enable Telnet, sign in as admin, and invoke su for root access.

CVSS severity9.8
Critical
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Jlink AX1800 1.0 allows remote attackers to execute arbitrary code through an unauthenticated router API. The web management interface accepts an unauthenticated POST to /web/um_telnet_set.cgi, enabling Telnet with known administrative credentials. Network access to the management interface is sufficient to enable Telnet, sign in as admin, and invoke su for root access.

The record

CVE
CVE-2023-37057
Published
Jun 17, 2024
Updated
Jul 9, 2026
Vendor
Jlink
Product
AX1800
Classifications
CWE-288, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jlink · AX1800version=1.0

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-288Authentication Bypass Using an Alternate Path or Channel
T1190Exploit Public-Facing Application

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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