High severity · published Mar 31, 2026
CVE-2026-5178
Totolink A3300R cstecgi.cgi setIptvCfg command injection
8.8
CVSS
4%
EPSS
No
On KEV
Description
A security vulnerability has been detected in Totolink A3300R 17.0.0cu.557_b20221024. Affected by this issue is the function setIptvCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument vlanPriLan3 leads to command injection. Remote exploitation of the attack is possible. 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)4.0% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A3
A3300R · Totolink
17.0.0cu.557_b20221024 · source: vendor
AF
A3300r Firmware · Totolink
17.0.0cu.557_b20221024 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5178
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5178
Exploit
https://github.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_vlanPriLan3_cmd_inject
Third Party Advisory
https://vuldb.com/submit/779147
Third Party Advisory
https://vuldb.com/vuln/354246
Permissions Required
https://vuldb.com/vuln/354246/cti
Product
https://www.totolink.net/
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