CVE-2026-19814

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

HIGH
8.8
CVSS Score
Published: August 14, 2026 at 08:15 AM UTC
Updated: August 14, 2026 at 07:26 PM UTC
2 products affected across 1 vendorA800R FirmwareA800R

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Severity
HIGH8.8
Exploit prediction
EPSS 0.9%
SSVC
PoC

Description

A vulnerability was detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. Affected is the function setMacQos of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Performing a manipulation of the argument macAddress results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/389950
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/389950/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-19814
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/869431
Product
Source: cverecord
https://www.totolink.net/

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-121CWE-119

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