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Home / Vulnerability Intelligence / CVE-2026-7156

CVE-2026-7156 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: April 27, 2026

Totolink A8000RU - Command Injection

Published: April 27, 2026Updated: April 27, 2026Remote Exploitable

Overview

Totolink A8000RU 7.1cu.643_b20200521 contains a command injection caused by manipulation of the HTTP argument in /cgi-bin/cstecgi.cgi CGI Handler, letting remote attackers execute OS commands, exploit requires no special privileges.

Severity & Score

Severity: Critical
CVSS Score: 9.8
EPSS Score: 0.0%(Probability of exploitation in next 30 days)

Impact

Remote attackers can execute arbitrary OS commands, potentially taking full control of the device.

Mitigation

Update to the latest firmware version.

References

Social Media Activity(4 posts)

OffSequence
OffSequence
@offseq
Apr 27, 2026

šŸšØ CRITICAL: Totolink A8000RU (7.1cu.643_b20200521) is vulnerable to OS command injection (CVE-2026-7156, CVSS 9.3). Exploit is public ā€” remote attackers can fully compromise devices. Disable remote mgmt & restrict access now. https://radar.offseq.com/threat/cve-2026-7156-os-command-injection-in-totolink-a80-8abcd97a #OffSeq #CVE20267156 #IoTSecurity

View original post
TheHackerWire
TheHackerWire
@thehackerwire
Apr 27, 2026

šŸ”“ CVE-2026-7156 - Critical (9.8) A vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. Affected is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument HTTP results in os command injection. The att... šŸ”— https://www.thehackerwire.com/vulnerability/CVE-2026-7156/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

View original post
OffSequence
OffSequence
@offseq
Apr 27, 2026

šŸšØ CRITICAL: Totolink A8000RU (7.1cu.643_b20200521) is vulnerable to OS command injection (CVE-2026-7156, CVSS 9.3). Exploit is public ā€” remote attackers can fully compromise devices. Disable remote mgmt & restrict access now. https://radar.offseq.com/threat/cve-2026-7156-os-command-injection-in-totolink-a80-8abcd97a #OffSeq #CVE20267156 #IoTSecurity

View original post
TheHackerWire
TheHackerWire
@thehackerwire
Apr 27, 2026

šŸ”“ CVE-2026-7156 - Critical (9.8) A vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. Affected is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument HTTP results in os command injection. The att... šŸ”— https://www.thehackerwire.com/vulnerability/CVE-2026-7156/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

View original post

Related Resources

Details

CVE ID
CVE-2026-7156
Severity
Critical
CVSS Score
9.8
Type
command_injection
Status
new
EPSS
0.0%
Social Posts
4

CWE

  • CWE-77

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score

0.0%Probability of exploitation in the next 30 days