Vulnerability · Published Aug 27, 2025 · Assigned by VulDB

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

High 8.8

In plain English

A high-severity stack buffer overflow in E1700 from Linksys. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 75% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)1.5%top 24.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Linksys	E1700	1.0.0.4.003

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-321544 | Linksys E1700 QoSSetup stack-based overflow vdb-entry, technical-description
VDB-321544 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #634826 | Linksys E1700 E1700(1.0.0.4.003) Stack-based Buffer Overflow third-party-advisory
https://github.com/wudipjq/my_vuln/blob/main/Linksys2/vuln_60/60.md related
https://github.com/wudipjq/my_vuln/blob/main/Linksys2/vuln_60/60.md#poc exploit
https://www.linksys.com/ product