What’s Vulnerable › Vulnerabilities

CVE-2025-4496: TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer 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: none known
• Published: 2025-05-10 · updated 2026-06-17
• Weakness: CWE-119

Description

A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected products

• TOTOLINK A3000RU: 4.1.8cu.5241_b20210927
• TOTOLINK A3100R: 4.1.8cu.5241_b20210927
• TOTOLINK A800R Firmware: 4.1.8cu.5241_b20210927
• TOTOLINK A810R Firmware: 4.1.8cu.5241_b20210927
• TOTOLINK A950Rg Firmware: 4.1.8cu.5241_b20210927
• TOTOLINK N600R: 4.1.8cu.5241_b20210927
• TOTOLINK T10: 4.1.8cu.5241_b20210927

References

• https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/1.md
• https://vuldb.com/?ctiid.308212
• https://vuldb.com/?id.308212
• https://vuldb.com/?submit.567081
• https://www.totolink.net/
• https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/1.md

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