High severity · published Jan 6, 2026
CVE-2026-0641
TOTOLINK WA300 cstecgi.cgi sub_401510 command injection
8.8
CVSS
2.6%
EPSS
No
On KEV
Description
A security vulnerability has been detected in TOTOLINK WA300 5.2cu.7112_B20190227. This vulnerability affects the function sub_401510 of the file cstecgi.cgi. The manipulation of the argument UPLOAD_FILENAME leads to command injection. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.
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)2.6% · higher than 86% 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
WF
Wa300 Firmware · Totolink
5.2cu.7112_b20190227 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0641
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0641
Exploit
https://github.com/JackWesleyy/CVE/blob/main/WA300/TOTOLINK_WA300_RCE.md
Exploit
https://github.com/JackWesleyy/CVE/blob/main/WA300/TOTOLINK_WA300_RCE.md#poc
Permissions Required
https://vuldb.com/?ctiid.339684
Third Party Advisory
https://vuldb.com/?id.339684
Third Party Advisory
https://vuldb.com/?submit.732234
Product
https://www.totolink.net/
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