Critical severity · published Aug 31, 2026
CVE-2026-82616
TOTOLINK NR1800X cstecgi.cgi setUploadSetting stack-based overflow
9.9
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NR
NR1800X · TOTOLINK
9.1.0u.6681_B20230703 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82616
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82616
github.com
https://github.com/lxiansheng488-bit/-/blob/main/TOTOlink/totolink%20setUploadSetting%E6%A0%88%E6%BA%A2%E5%87%BA.pdf
vuldb.com
https://vuldb.com/cve/CVE-2026-82616
vuldb.com
https://vuldb.com/submit/892941
vuldb.com
https://vuldb.com/vuln/397117
vuldb.com
https://vuldb.com/vuln/397117/cti
www.totolink.net
https://www.totolink.net/
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