Buffer overflow in Totolink Lr1200gb
CVE-2025-60684
A stack buffer overflow vulnerability exists in the ToToLink LR1200GB (V9.1.0u.6619_B20230130) and NR1800X (V9.1.0u.6681_B20230703) Router firmware within the cstecgi.cgi binary (sub_42F32C function). The web interface reads the "lang" parameter and constructs Help URL strings using sprintf() into fixed-size stack buffers without proper length validation. Maliciously crafted input can overflow these buffers, potentially leading to arbitrary code execution or memory corruption, without requiring authentication.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (41.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Totolink Lr1200gb
- Totolink Lr1200gb Firmware — versions 9.1.0u.6619_b20230130
- Totolink Nr1800x
- Totolink Nr1800x Firmware — versions 9.1.0u.6681_b20230703
Weakness classification (CWE)
References
- totolink.com (Broken Link)
- www.totolink.net/ (Product)
- github.com/yifan20020708/SGTaint-0-day/blob/main/ToToLink/ToToLink-LR1200GB/CVE… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-60684?
- CVE-2025-60684 is a medium-severity vulnerability in Totolink Lr1200gb, classified under Stack-based Buffer Overflow. CVSS score: 6.5/10. Published 2025-11-13.
- How severe is CVE-2025-60684?
- Medium severity. CVSS v3 base score is 6.5 out of 10.