High severity · published Jan 28, 2026
CVE-2026-1548
Totolink A7000R cstecgi.cgi CloudACMunualUpdateUserdata command injection
8.8
CVSS
3.4%
EPSS
No
On KEV
Description
A flaw has been found in Totolink A7000R 4.1cu.4154. This impacts the function CloudACMunualUpdateUserdata of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument url causes command injection. The attack can be initiated remotely. The exploit has been published 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)3.4% · higher than 89% 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-2026-1548
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1548
Exploit
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/02_RCE_CloudACMunualUpdateUserdata_RCE.md
Exploit
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/02_RCE_CloudACMunualUpdateUserdata_RCE.md#poc
Permissions Required
https://vuldb.com/?ctiid.343232
Third Party Advisory
https://vuldb.com/?id.343232
Third Party Advisory
https://vuldb.com/?submit.739715
Product
https://www.totolink.net/
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