High 8.8Published Aug 14, 2026

CVE-2026-19813TOTOLINK A800R firewall.so cstecgi.cgi setMacFilterRules stack-based overflow

Updated under an hour ago (2026-10-19 06:30 UTC)

Does this affect you?

It affects TOTOLINK A800R. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for TOTOLINK A800R

Exploited in the last 30 days

A security vulnerability has been detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. This impacts the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Such manipulation of the argument Comment leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.

CVSS: 8.8 HIGH (v3.1, CNA)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
Weakness (CWE): CWE-121, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Aug 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

TOTOLINK A800R totolink:a800r_firmware	4.1.2cu.5137_B20200730	CNA record

References

https://vuldb.com/vuln/389949vdb-entry, technical-description
https://vuldb.com/vuln/389949/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-19813third-party-advisory
https://vuldb.com/submit/869430third-party-advisory
https://github.com/panda666-888/vuls/blob/main/totolink/a800r/setMacFilterRules.mdexploit
https://www.totolink.net/product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.