CVE-2026-2686Public exploitNetwork attack vector

Unauthenticated command execution via User argument injection

Published Feb 19, 2026 · Updated Feb 19, 2026

OS command injection in Guangzhou Dingcheng G10 Series 3.1.0.181203 allows remote attackers to execute commands via the User argument. The qq function in /cgi-bin/session_login.cgi incorporates the attacker-controlled User value into an operating-system command without neutralizing shell metacharacters. No authentication or user interaction is required, and successful exploitation grants control over appliance data, configuration, and service availability.

CVSS severity9.8
Critical
EPSS probability2.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Guangzhou Dingcheng G10 Series 3.1.0.181203 allows remote attackers to execute commands via the User argument. The qq function in /cgi-bin/session_login.cgi incorporates the attacker-controlled User value into an operating-system command without neutralizing shell metacharacters. No authentication or user interaction is required, and successful exploitation grants control over appliance data, configuration, and service availability.

The record

CVE
CVE-2026-2686
Published
Feb 19, 2026
Updated
Feb 19, 2026
Vendor
Guangzhou Dingcheng Information Technology Co., Ltd.
Product
G10 Series
Classifications
CWE-78, CWE-77, T1190, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.1.0.181203

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Guangzhou Dingcheng Information Technology Co., Ltd. · G10 Seriesversion=3.1.0.181203

Published CVSS scores

8.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
9.8VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0VulDBAV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1190Exploit Public-Facing Application
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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