Critical severity · published Jan 28, 2026
CVE-2026-1547
Totolink A7000R cstecgi.cgi setUnloadUserData command injection
9.8
CVSS
3%
EPSS
No
On KEV
Description
A vulnerability was detected in Totolink A7000R 4.1cu.4154. This affects the function setUnloadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument plugin_name results in command injection. It is possible to launch the attack remotely. The exploit is now public and may be used.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.0% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A7
A7000R · Totolink
4.1cu.4154 · source: vendor
AF
A7000r Firmware · Totolink
4.1cu.4154 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1547
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1547
Exploit
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/01_RCE_setUnloadUserData_RCE.md
Exploit
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/01_RCE_setUnloadUserData_RCE.md#poc
Permissions Required
https://vuldb.com/?ctiid.343231
Third Party Advisory
https://vuldb.com/?id.343231
Third Party Advisory
https://vuldb.com/?submit.739713
Product
https://www.totolink.net/
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