Critical severity · published Feb 19, 2026
CVE-2026-2686
SECCN Dingcheng G10 session_login.cgi qq os command injection
9.8
CVSS
2.6%
EPSS
No
On KEV
Description
A security vulnerability has been detected in SECCN Dingcheng G10 3.1.0.181203. This impacts the function qq of the file /cgi-bin/session_login.cgi. The manipulation of the argument User leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly 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)2.6% · higher than 85% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
G1
G10 · SECCN Dingcheng
3.1.0.181203 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2686
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2686
github.com
https://github.com/cha0yang1/SECCN/blob/main/UnauthorizedRCE.md
github.com
https://github.com/cha0yang1/SECCN/blob/main/UnauthorizedRCE.md#2-vulnerability-reproduction-proof-of-concept
vuldb.com
https://vuldb.com/?ctiid.346488
vuldb.com
https://vuldb.com/?id.346488
vuldb.com
https://vuldb.com/?submit.754200