Answer in brief
CVE-2026-19814 records a Unknown severity vulnerability in TOTOLINK A800R firewall.so cstecgi.cgi setMacQos stack-based overflow. The current sources do not mark it as known exploited. The current feed maps TOTOLINK/A800R (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps TOTOLINK/A800R (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| TOTOLINK/A800Rgeneric | 4.1.2cu.5137_B20200730 | Not reported |
Published upstream
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 14, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-19814 records a Unknown severity vulnerability in TOTOLINK A800R firewall.so cstecgi.cgi setMacQos stack-based overflow. The current sources do not mark it as known exploited. The current feed maps TOTOLINK/A800R (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps TOTOLINK/A800R (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| TOTOLINK/A800Rgeneric | 4.1.2cu.5137_B20200730 | Not reported |
Published upstream
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 14, 2026
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.
Quoted source text, attributed separately from HOL analysis.