CVE-2026-5677: OS Command Injection in Totolink A7100RU
CVE-2026-5677 is a medium severity OS command injection vulnerability in the Totolink A7100RU router firmware version 7. 4cu. 2313_b20191024. The flaw exists in the CsteSystem function within the /cgi-bin/cstecgi. cgi file, where manipulation of the resetFlags argument can lead to remote command execution. The vulnerability can be exploited without authentication or user interaction. Although an exploit has been publicly released, there is no confirmed evidence of active exploitation in the wild. No official patch or remediation guidance has been provided by the vendor as of the publication date.
AI Analysis
Technical Summary
This vulnerability involves an OS command injection in the Totolink A7100RU router firmware 7.4cu.2313_b20191024. Specifically, the CsteSystem function in /cgi-bin/cstecgi.cgi improperly handles the resetFlags argument, allowing an attacker to inject arbitrary OS commands remotely. The CVSS 4.0 base score is 6.9, reflecting medium severity with network attack vector, no privileges or user interaction required, and partial impact on confidentiality, integrity, and availability. The vulnerability is publicly known with an exploit available, but no vendor patch or official remediation has been documented.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary OS commands on the affected device without authentication, potentially compromising device integrity and availability. The vulnerability affects the specified firmware version of the Totolink A7100RU router. There is no confirmed active exploitation in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting access to the device's management interface from untrusted networks to reduce exposure. Monitor vendor communications for updates regarding patches or mitigations.
CVE-2026-5677: OS Command Injection in Totolink A7100RU
Description
CVE-2026-5677 is a medium severity OS command injection vulnerability in the Totolink A7100RU router firmware version 7. 4cu. 2313_b20191024. The flaw exists in the CsteSystem function within the /cgi-bin/cstecgi. cgi file, where manipulation of the resetFlags argument can lead to remote command execution. The vulnerability can be exploited without authentication or user interaction. Although an exploit has been publicly released, there is no confirmed evidence of active exploitation in the wild. No official patch or remediation guidance has been provided by the vendor as of the publication date.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an OS command injection in the Totolink A7100RU router firmware 7.4cu.2313_b20191024. Specifically, the CsteSystem function in /cgi-bin/cstecgi.cgi improperly handles the resetFlags argument, allowing an attacker to inject arbitrary OS commands remotely. The CVSS 4.0 base score is 6.9, reflecting medium severity with network attack vector, no privileges or user interaction required, and partial impact on confidentiality, integrity, and availability. The vulnerability is publicly known with an exploit available, but no vendor patch or official remediation has been documented.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary OS commands on the affected device without authentication, potentially compromising device integrity and availability. The vulnerability affects the specified firmware version of the Totolink A7100RU router. There is no confirmed active exploitation in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting access to the device's management interface from untrusted networks to reduce exposure. Monitor vendor communications for updates regarding patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-06T09:38:55.422Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d3ff4a0a160ebd92d10004
Added to database: 4/6/2026, 6:45:30 PM
Last enriched: 4/6/2026, 7:00:27 PM
Last updated: 4/7/2026, 3:24:22 AM
Views: 6
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