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Fencer Vulns
medium 5.3

CVE-2025-5876 json

Lucky LM-520-SC/LM-520-FSC/LM-520-FSC-SAM missing authentication

published 2025-06-09 17 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-17459

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

A vulnerability classified as problematic was found in Lucky LM-520-SC, LM-520-FSC and LM-520-FSC-SAM up to 20250321. Affected by this vulnerability is an unknown functionality. The manipulation leads to missing authentication. The attack can be launched 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
17 mo ago

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/zeke2997/cve_request_LuckyTechnologyLtd 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
CNA 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • Lucky LM-520-SC
  • Lucky LM-520-FSC
  • Lucky LM-520-FSC-SAM

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality
  • CWE-287 Improper Authentication

References

Sources

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.