CVE-2025-9527: Linksys E1700 QoSSetup stack-based overflow

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-08-27 · updated 2026-06-17
Weakness: CWE-119

Description

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.

Affected products

Linksys E1700: 1.0.0.4.003

References

https://github.com/wudipjq/my_vuln/blob/main/Linksys2/vuln_60/60.md
https://github.com/wudipjq/my_vuln/blob/main/Linksys2/vuln_60/60.md#poc
https://vuldb.com/?ctiid.321544
https://vuldb.com/?id.321544
https://vuldb.com/?submit.634826
https://www.linksys.com/

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