LB-LINK BL-AC3600 Web Management Interface lighttpd.cgi geteasycfg information disclosure

published 2025-07-14 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-21301

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

A vulnerability, which was classified as critical, was found in LB-LINK BL-AC3600 up to 1.0.22. This affects the function geteasycfg of the file /cgi-bin/lighttpd.cgi of the component Web Management Interface. The manipulation of the argument Password leads to information disclosure. It is possible to initiate the attack 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.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: partial
Assessed: 15 mo ago (2025-07-14)

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/waiwai24/0101/blob/main/CVEs/Blink/Plaintext_Password_Leakage_in_the_Web_Management_Interface_of_BL-AC3600_Routers.md#poc referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/waiwai24/0101/blob/main/CVEs/Blink/Plaintext_Password_Leakage_in_the_Web_Management_Interface_of_BL-AC3600_Routers.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	6.9	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
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:W/RC:R
CNA	3.0	5.3	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:W/RC:R
CNA	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:W/RC:UR
CNA	4.0	5.5	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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

LB-LINK BL-AC3600

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-284 Improper Access Control
CWE-522 Insufficiently Protected Credentials

References

github.com /waiwai24/0101/blob/main/CVEs/Blink/Plaintext_Password_Leakage_in_the_Web_Management_Interface_of_BL-AC3600_Ro
exploit, third-party-advisory
github.com /waiwai24/0101/blob/main/CVEs/Blink/Plaintext_Password_Leakage_in_the_Web_Management_Interface_of_BL-AC3600_Ro
related, exploit, third-party-advisory
vuldb.com /?id.316263
vdb-entry, technical-description, third-party-advisory
vuldb.com /?ctiid.316263
signature, permissions-required, vdb-entry
vuldb.com /?submit.605632
third-party-advisory, vdb-entry

Sources

CVE List CVE-2025-7565
NVD CVE-2025-7565

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary