CVE-2026-19814
TOTOLINK A800R firewall.so cstecgi.cgi setMacQos stack-based overflow
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.
INFO
Published Date :
Aug. 14, 2026, 9:16 a.m.
Last Modified :
Aug. 14, 2026, 9:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update the device firmware.
- Apply vendor-provided patches.
- Monitor for exploit activity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-19814.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-19814 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-19814
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-19814 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-19814 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Aug. 14, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:o:totolink:a800r_firmware:*:*:*:*:*:*:*:*'], 'vendor': 'TOTOLINK', 'modules': ['firewall.so'], 'product': 'A800R', 'versions': [{'status': 'affected', 'version': '4.1.2cu.5137_B20200730'}]}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CVSS V2 (AV:N/AC:L/Au:S/C:C/I:C/A:C) Added CWE CWE-119 Added CWE CWE-121 Added Reference https://github.com/panda666-888/vuls/blob/main/totolink/a800r/setMacQos.md Added Reference https://vuldb.com/cve/CVE-2026-19814 Added Reference https://vuldb.com/submit/869431 Added Reference https://vuldb.com/vuln/389950 Added Reference https://vuldb.com/vuln/389950/cti Added Reference https://www.totolink.net/