Buffer overflow in Linksys E1700
CVE-2025-9527
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.015 (72.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.015 · change: +0.000
Affected products
- Linksys E1700 — versions 1.0.0.4.003
- Linksys E1700 Firmware — versions 1.0.0.4.003
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/wudipjq/my_vuln/blob/main/Linksys2/vuln_60/60.md (related, Exploit, Third Party Advisory)
- github.com/wudipjq/my_vuln/blob/main/Linksys2/vuln_60/60.md (Exploit, Third Party Advisory, exploit)
- www.linksys.com/ (Product, product)
Frequently asked questions
- What is CVE-2025-9527?
- CVE-2025-9527 is a high-severity vulnerability in Linksys E1700, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-08-27.
- How severe is CVE-2025-9527?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-9527 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.