CVE-2025-5600: TOTOLINK EX1200T cstecgi.cgi setLanguageCfg stack-based overflow

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-06-04 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability, which was classified as critical, has been found in TOTOLINK EX1200T 4.1.2cu.5232_B20210713. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument LangType leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected products

TOTOLINK EX1200T: 4.1.2cu.5232_b20210713

References

https://kn0sinna.notion.site/TOTOLINK-EX1200T-stack-based-BufferOverflow-vulnerability-204b1876cd6e80709ce8dab4778dce55
https://vuldb.com/?ctiid.311087
https://vuldb.com/?id.311087
https://vuldb.com/?submit.588075
https://www.totolink.net/
https://kn0sinna.notion.site/TOTOLINK-EX1200T-stack-based-BufferOverflow-vulnerability-204b1876cd6e80709ce8dab4778dce55

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