Vulnerability record · CVE-2026-19812 · published 14 August 2026

CVE-2026-19812: Memory buffer overflow vulnerability

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.

7.4 CVSS 4.0 High EPSS 0.85% · top 43.4% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow Deferred

7.4CVSS 4.0 base score, v2 9.0

0.85%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

6References

14 Aug 2026Last modified by NVD

Description

CVSS:4.0/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:

References

Link	Tags
https://github.com/panda666-888/vuls/blob/main/totolink/a800r/UploadCustomModule.md
https://vuldb.com/cve/CVE-2026-19812
https://vuldb.com/submit/869428
https://vuldb.com/vuln/389948
https://vuldb.com/vuln/389948/cti
https://www.totolink.net/

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Source: NIST National Vulnerability Database (record CVE-2026-19812), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.