Buffer overflow in Totolink Nr1800x
CVE-2026-82616
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (57.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.009 · change: +0.002
Affected products
- Totolink Nr1800x — versions 9.1.0u.6681_B20230703
Weakness classification (CWE)
References
- vuldb.com/vuln/397117 (technical-description, vdb-entry)
- vuldb.com/vuln/397117/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-82616 (third-party-advisory)
- vuldb.com/submit/892941 (third-party-advisory)
- github.com/lxiansheng488-bit/-/blob/main/TOTOlink/totolink setUploadSetting栈溢出… (exploit)
- www.totolink.net/ (product)
Frequently asked questions
- What is CVE-2026-82616?
- CVE-2026-82616 is a critical-severity vulnerability in Totolink Nr1800x, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.9/10. Published 2026-08-31.
- How severe is CVE-2026-82616?
- Critical severity. CVSS v3 base score is 9.9 out of 10.