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Medium severity · published Nov 13, 2025
CVE-2025-60688
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…
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
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 (setDefResponse function). The binary reads the "IpAddress" parameter from a web request and copies it into a fixed-size stack buffer using strcpy() without any length validation. Maliciously crafted input can overflow the buffer, leading to potential arbitrary code execution or memory corruption, without requiring authentication.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LF
Lr1200gb Firmware · Totolink
9.1.0u.6619_b20230130 · source: NVD
NF
Nr1800x Firmware · Totolink
9.1.0u.6681_b20230703 · source: NVD
Affected product
LF
Lr1200gb Firmware
Totolink
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-60688
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-60688
Exploit
https://github.com/yifan20020708/SGTaint-0-day/blob/main/ToToLink/ToToLink-LR1200GB/CVE-2025-60688.md
Product
https://www.totolink.net/
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