High severity · published Apr 6, 2026
CVE-2026-5677
Totolink A7100RU cstecgi.cgi CsteSystem os command injection
7.3
CVSS
1.3%
EPSS
No
On KEV
Description
A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. Impacted is the function CsteSystem of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument resetFlags results in os command injection. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A7
A7100RU · Totolink
7.4cu.2313_b20191024 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5677
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5677
github.com
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_184/README.md
vuldb.com
https://vuldb.com/submit/792606
vuldb.com
https://vuldb.com/vuln/355504
vuldb.com
https://vuldb.com/vuln/355504/cti
www.totolink.net
https://www.totolink.net/
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