CVE-2026-5691: OS Command Injection in Totolink A7100RU
CVE-2026-5691 is a remote OS command injection vulnerability in the Totolink A7100RU router firmware version 7. 4cu. 2313_b20191024. The flaw exists in the setFirewallType function of the /cgi-bin/cstecgi. cgi file, where improper handling of the firewallType argument allows an attacker to inject operating system commands. This vulnerability can be exploited without authentication and does not require user interaction. Although the exploit has been publicly disclosed, there are no known exploits in the wild at this time. No official patch or remediation guidance has been provided by the vendor yet.
AI Analysis
Technical Summary
The Totolink A7100RU router firmware 7.4cu.2313_b20191024 contains a remote OS command injection vulnerability in the setFirewallType function of /cgi-bin/cstecgi.cgi. Manipulating the firewallType parameter enables an attacker to execute arbitrary OS commands remotely without authentication or user interaction. The vulnerability has been publicly disclosed, but no official fix or patch is currently available. The CVSS 4.0 base score is 6.9, indicating medium severity with network attack vector and no privileges required.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary operating system commands on the affected device, potentially leading to full control over the router. This can compromise network security and confidentiality. However, there are no reports of active exploitation in the wild as of the published date.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider disabling remote management features if enabled and restrict network access to the device's management interface to trusted hosts only. Monitor vendor channels for updates and apply patches promptly once available.
CVE-2026-5691: OS Command Injection in Totolink A7100RU
Description
CVE-2026-5691 is a remote OS command injection vulnerability in the Totolink A7100RU router firmware version 7. 4cu. 2313_b20191024. The flaw exists in the setFirewallType function of the /cgi-bin/cstecgi. cgi file, where improper handling of the firewallType argument allows an attacker to inject operating system commands. This vulnerability can be exploited without authentication and does not require user interaction. Although the exploit has been publicly disclosed, there are no known exploits in the wild at this time. No official patch or remediation guidance has been provided by the vendor yet.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Totolink A7100RU router firmware 7.4cu.2313_b20191024 contains a remote OS command injection vulnerability in the setFirewallType function of /cgi-bin/cstecgi.cgi. Manipulating the firewallType parameter enables an attacker to execute arbitrary OS commands remotely without authentication or user interaction. The vulnerability has been publicly disclosed, but no official fix or patch is currently available. The CVSS 4.0 base score is 6.9, indicating medium severity with network attack vector and no privileges required.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary operating system commands on the affected device, potentially leading to full control over the router. This can compromise network security and confidentiality. However, there are no reports of active exploitation in the wild as of the published date.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider disabling remote management features if enabled and restrict network access to the device's management interface to trusted hosts only. Monitor vendor channels for updates and apply patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-06T10:27:07.838Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d43e920a160ebd92e74967
Added to database: 4/6/2026, 11:15:30 PM
Last enriched: 4/6/2026, 11:30:27 PM
Last updated: 4/7/2026, 1:23:12 AM
Views: 7
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