Sapido Wireless Router - OS Command Injection

published 2025-06-24 last yr. modified 2026-06-17 4mo ago also EUVD-2025-19048

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

Multiple wireless router models from Sapido have an OS Command Injection vulnerability, allowing unauthenticated remote attackers to inject arbitrary OS commands and execute them on the server. The affected models are out of support; replacing the device is recommended.

Is CVE-2025-6559 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: last yr. (2025-06-24)

Exploit prediction

1.71% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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

Affected products

Sapido BR071n
Sapido BR261c
Sapido BR270n
Sapido BR476n
Sapido BRC70n
Sapido BRC70x
Sapido BRC76n
Sapido BRD70n
Sapido BRE70n
Sapido BRE71n
Sapido BRF61c
Sapido BRF71n

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

twcert.org.tw /tw/cp-132-10196-898d3-1.html
third-party-advisory
twcert.org.tw /en/cp-139-10195-69da1-2.html
third-party-advisory

Sources

CVE List CVE-2025-6559
NVD CVE-2025-6559

Fencer Intel 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.