CVE-2025-57685Public exploit

Unauthenticated command execution via unchecked domain parameter

Published Sep 22, 2025 · Updated Sep 22, 2025

Command injection in affected LB-Link router firmware allows remote attackers to execute arbitrary commands via the management interface. The unauthenticated /goform/set_serial_cfg handler passes the domain field through bs_SetSerial and snprintf to bl_do_system and system without strict validation. Adjacent-network access is sufficient to start telnetd with a root shell, giving complete control of the router.

CVSS severity8.8
High
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in affected LB-Link router firmware allows remote attackers to execute arbitrary commands via the management interface. The unauthenticated /goform/set_serial_cfg handler passes the domain field through bs_SetSerial and snprintf to bl_do_system and system without strict validation. Adjacent-network access is sufficient to start telnetd with a root shell, giving complete control of the router.

The record

CVE
CVE-2025-57685
Published
Sep 22, 2025
Updated
Sep 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:A/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

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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