Critical 9.9Published Aug 31, 2026

CVE-2026-82616TOTOLINK NR1800X cstecgi.cgi setUploadSetting stack-based overflow

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects TOTOLINK NR1800X. Add what you run to find out whether that includes you.

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Every CVE for TOTOLINK NR1800X

Exploited in the last 30 days

A vulnerability was found in TOTOLINK NR1800X 9.1.0u.6681_B20230703. Impacted is the function setUploadSetting of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.

CVSS: 9.9 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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: Sep 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

TOTOLINK NR1800X totolink:nr1800x_firmware	9.1.0u.6681_B20230703	CNA record

References

https://vuldb.com/vuln/397117vdb-entry, technical-description
https://vuldb.com/vuln/397117/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-82616third-party-advisory
https://vuldb.com/submit/892941third-party-advisory
https://github.com/lxiansheng488-bit/-/blob/main/TOTOlink/totolink%20setUploadSetting%E6%A0%88%E6%BA%A2%E5%87%BA.pdfexploit
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.