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VulnerabilityPublished

CVE-2025-7572: LB-LINK BL-AC1900 · Information Disclosure

Affects LB-LINK BL-AC1900Source CVE Database V5

0

Public exploit available · CVSS 6.9 Medium.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 4.0 base score
6.9Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 Jul 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: evidence found.

    CVSS exploit maturity: proof of concept public

  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), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
LB-LINK BL-AC1900Affected
  • =20250702
Fixed in–

AI-suggested

Given the absence of an official patch, European organizations should implement the following specific mitigations: 1) Immediately identify and inventory all LB-LINK devices running affected firmware versions using network scanning and asset management tools. 2) Restrict access to the /cgi-bin/lighttpd.cgi interface by implementing firewall rules or access control lists (ACLs) to limit exposure to trusted management networks only, blocking external internet access where possible. 3) Employ network segmentation to isolate vulnerable devices from critical systems and sensitive data. 4) Monitor network traffic for unusual requests targeting the /cgi-bin/lighttpd.cgi endpoint or abnormal information disclosure patterns. 5) Consider deploying Web Application Firewalls (WAFs) or Intrusion Prevention Systems (IPS) with custom signatures to detect and block exploit attempts against this CGI interface. 6) Engage with LB-LINK support channels persistently to demand a security update or official guidance. 7) As a longer-term measure, evaluate replacing affected devices with alternatives from vendors with active security support and patching practices. 8) Educate IT staff about this vulnerability to ensure rapid response to any suspicious activity related to these devices.

Description

A vulnerability classified as critical was found in LB-LINK BL-AC1900, BL-AC2100_AZ3, BL-AC3600, BL-AX1800, BL-AX5400P and BL-WR9000 up to 20250702. This vulnerability affects the function bs_GetHostInfo in the library libblinkapi.so of the file /cgi-bin/lighttpd.cgi. The manipulation leads to information disclosure. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

References

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