CVE-2026-19815

TOTOLINK A800R firewall.so cstecgi.cgi setParentalRules stack-based overflow

State: Published
Severity: 8.7 High
Published: Aug 14, 2026
Updated: Aug 14, 2026
Reserved: Aug 14, 2026

Description

A flaw has been found in TOTOLINK A800R 4.1.2cu.5137_B20200730. Affected by this vulnerability is the function setParentalRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Executing a manipulation of the argument urlKeyword can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	VulDB
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
3.0	8.8 High	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
2.0	9.0 High	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-121 Stack-based Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
A800RTOTOLINK	4.1.2cu.5137_B20200730Affected

References

VDB-389951 | TOTOLINK A800R firewall.so cstecgi.cgi setParentalRules stack-based overflowvdb-entrytechnical-description
VDB-389951 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-19815 | CVE Analysis and Reportthird-party-advisory
Submit #869442 | Totolink A800R V4.1.2cu.5137_B20200730 Buffer Overflowthird-party-advisory
https://github.com/panda666-888/vuls/blob/main/totolink/a800r/setParentalRules.mdexploit
https://www.totolink.net/product

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