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CVE-2026-19812highCWE-119CWE-121

TOTOLINK A800R product.so cstecgi.cgi UploadCustomModule stack-based overflow

41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.7epss 0.5%
exploitation probability
0.5%top 60% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
A weakness has been identified in TOTOLINK A800R 4.1.2cu.5137_B20200730. This affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi of the component product.so. This manipulation of the argument File causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Affected products
TOTOLINK · A800R
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.