High 8.8Published Aug 14, 2026

CVE-2026-19812TOTOLINK A800R product.so cstecgi.cgi UploadCustomModule stack-based overflow

Updated under an hour ago (2026-10-19 07:30 UTC)

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Every CVE for TOTOLINK A800R

Exploited in the last 30 days

A weakness has been identified in TOTOLINK A800R 4.1.2cu.5137_B20200730. This affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi of the component product.so. This manipulation of the argument File causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

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 14, 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/389948vdb-entry, technical-description
https://vuldb.com/vuln/389948/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-19812third-party-advisory
https://vuldb.com/submit/869428third-party-advisory
https://github.com/panda666-888/vuls/blob/main/totolink/a800r/UploadCustomModule.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.