CVE-2026-19846 HIGH

CVE-2026-19846: TOTOLINK A800R firewall.so cstecgi.cgi setUrlFilterRules 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 vulnerability was identified in TOTOLINK A800R 4.1.2cu.5137_B20200730. This impacts the function setUrlFilterRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. The manipulation of the argument url leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used.

Key dates

02Disclosure timeline

August 14, 2026 CVE published
August 14, 2026 Record updated