CVE-2025-9527: high-severity vulnerability in Linksys E1700
Linksys E1700 QoSSetup stack-based overflow
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 1.5%
A vulnerability was found in Linksys E1700 1.0.0.4.003. This affects the function QoSSetup of the file /goform/QoSSetup. Performing manipulation of the argument ack_policy results in stack-based buffer overflow. The attack may be initiated remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Affected products
Linksys · E1700Related CVEs — Linksys E1700
In the same product, most dangerous first.
CVE-2025-9528MEDIUMLinksys E1700 systemCommand os command injectionEPSS 54.5%CVE-2026-108896CRITICALLinksys E1700 setLinksysIpv6 os command injectionEPSS 2.2%CVE-2026-108895CRITICALLinksys E1700 setDMZ os command injectionEPSS 2.2%CVE-2026-108894CRITICALLinksys E1700 Static Route addStaticRoute os command injectionEPSS 2.2%CVE-2025-9526HIGHLinksys E1700 setSysAdm stack-based overflowEPSS 1.5%CVE-2025-9525HIGHLinksys E1700 setWan stack-based overflowEPSS 1.5%