CVE-2026-19844

HIGH 8.8

TOTOLINK A800R ipv6.so cstecgi.cgi setRadvdCfg stack-based overflow

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability was found in TOTOLINK A800R 4.1.2cu.5137_B20200730. The impacted element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component ipv6.so. Performing a manipulation of the argument radvdinterfacename results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used.

CWE	CWE-121 CWE-119
Vendor	totolink
Product	a800r
Published	Aug 14, 2026

Stay Ahead of the Next One

Get instant alerts for totolink a800r

Be the first to know when new high vulnerabilities affecting totolink a800r are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

TOTOLINK / A800R

4.1.2cu.5137_B20200730

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/389980 vuldb.com: https://vuldb.com/vuln/389980/cti vuldb.com: https://vuldb.com/cve/CVE-2026-19844 vuldb.com: https://vuldb.com/submit/869443 github.com: https://github.com/panda666-888/vuls/blob/main/totolink/a800r/setRadvdCfg.md totolink.net: https://www.totolink.net/

Credits

🔍 panda_0x1 (VulDB User)