Buffer overflow in Linksys E1200
CVE-2025-60691
A stack-based buffer overflow exists in the httpd binary of Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). The apply_cgi and block_cgi functions copy user-supplied input from the "url" CGI parameter into stack buffers (v36, v29) using sprintf without bounds checking. Because these buffers are allocated as single-byte variables, any non-empty input will trigger a buffer overflow. Remote attackers can exploit this vulnerability via crafted HTTP requests to execute arbitrary code or cause denial of service without authentication.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (51.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Linksys E1200 — versions 2
- Linksys E1200 Firmware — versions 2.0.11.001
Weakness classification (CWE)
References
- linksys.com (Product)
- www.linksys.com/ (Product)
- github.com/yifan20020708/SGTaint-0-day/blob/main/Linksys/Linksys-E1200/CVE-2025… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-60691?
- CVE-2025-60691 is a high-severity vulnerability in Linksys E1200, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-11-13.
- How severe is CVE-2025-60691?
- High severity. CVSS v3 base score is 8.8 out of 10.