Vulnerability · Published Aug 31, 2026 · Assigned by VulDB
CVE-2026-82616TOTOLINK NR1800X cstecgi.cgi setUploadSetting stack-based overflow
Critical 9.9
In plain English
A critical-severity stack buffer overflow in NR1800X from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 58% of all known vulnerabilities).
Severity (CVSS 3.1)9.9Critical
Exploit odds (30 days)0.9%top 41.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: 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
References
- VDB-397117 | TOTOLINK NR1800X cstecgi.cgi setUploadSetting stack-based overflow vdb-entry, technical-description
- VDB-397117 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-82616 | CVE Analysis and Report third-party-advisory
- Submit #892941 | TOTOLINK NR1800X V9.1.0u.6681_B20230703 Stack-based Buffer Overflow third-party-advisory
- https://github.com/lxiansheng488-bit/-/blob/main/TOTOlink/totolink%20setUploadSetting%E6%A0%88%E6%BA%A2%E5%87%BA.pdf exploit
- https://www.totolink.net/ product