High severity · published May 4, 2026
CVE-2026-7717
Totolink WA300 POST Request cstecgi.cgi UploadCustomModule buffer overflow
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
A vulnerability was determined in Totolink WA300 5.2cu.7112_B20190227. This issue affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Executing a manipulation of the argument File can lead to buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WA
WA300 · Totolink
5.2cu.7112_B20190227 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-7717
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7717
lavender-bicycle-a5a.notion.site
https://lavender-bicycle-a5a.notion.site/TOTOLINK-WA300-UploadCustomModule-34553a41781f80a8a287e48a7fb04de9
vuldb.com
https://vuldb.com/submit/807193
vuldb.com
https://vuldb.com/vuln/360893
vuldb.com
https://vuldb.com/vuln/360893/cti
www.totolink.net
https://www.totolink.net/
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