CVE-2026-19812 HIGH

CVE-2026-19812: TOTOLINK A800R product.so cstecgi.cgi UploadCustomModule stack-based overflow

Vendor Totolink
Product A800R
Weakness CWE-121
Published August 14, 2026
Last update August 14, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 14, 2026 CVE published