CVE-2026-7720: Command Injection in Totolink WA300
CVE-2026-7720 is a command injection vulnerability in the Totolink WA300 router firmware version 5.2cu.7112_B20190227. The issue exists in the setLanguageCfg function of the /cgi-bin/cstecgi.cgi POST request handler, where manipulation of the langType argument allows remote attackers to execute arbitrary commands. The vulnerability has a medium severity with a CVSS 4.0 base score of 5.3. Although an exploit is publicly available, there are no known exploits observed in the wild. No official patch or remediation guidance has been provided by the vendor at this time.
AI Analysis
Technical Summary
This vulnerability affects Totolink WA300 firmware version 5.2cu.7112_B20190227. The setLanguageCfg function in the /cgi-bin/cstecgi.cgi component improperly handles the langType argument in POST requests, leading to command injection. Remote attackers can exploit this flaw to execute arbitrary commands on the device. The CVSS 4.0 score is 5.3, indicating medium severity. No official patch or remediation level has been disclosed, and the device is not a cloud service, so remediation depends on vendor updates or user action. Public exploit code exists but no confirmed active exploitation has been reported.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary commands on the affected Totolink WA300 device, potentially compromising device integrity and confidentiality. This could lead to unauthorized control over the device. However, the vulnerability is rated medium severity and requires no privileges and no user interaction, with low vector complexity and low impact on confidentiality, integrity, and availability as per CVSS 4.0 metrics.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation has been published, users should monitor Totolink communications for updates. Until a patch is available, restricting access to the device's management interface from untrusted networks may reduce exposure.
CVE-2026-7720: Command Injection in Totolink WA300
Description
CVE-2026-7720 is a command injection vulnerability in the Totolink WA300 router firmware version 5.2cu.7112_B20190227. The issue exists in the setLanguageCfg function of the /cgi-bin/cstecgi.cgi POST request handler, where manipulation of the langType argument allows remote attackers to execute arbitrary commands. The vulnerability has a medium severity with a CVSS 4.0 base score of 5.3. Although an exploit is publicly available, there are no known exploits observed in the wild. No official patch or remediation guidance has been provided by the vendor at this time.
CVSS v4.0
Score 5.3medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects Totolink WA300 firmware version 5.2cu.7112_B20190227. The setLanguageCfg function in the /cgi-bin/cstecgi.cgi component improperly handles the langType argument in POST requests, leading to command injection. Remote attackers can exploit this flaw to execute arbitrary commands on the device. The CVSS 4.0 score is 5.3, indicating medium severity. No official patch or remediation level has been disclosed, and the device is not a cloud service, so remediation depends on vendor updates or user action. Public exploit code exists but no confirmed active exploitation has been reported.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary commands on the affected Totolink WA300 device, potentially compromising device integrity and confidentiality. This could lead to unauthorized control over the device. However, the vulnerability is rated medium severity and requires no privileges and no user interaction, with low vector complexity and low impact on confidentiality, integrity, and availability as per CVSS 4.0 metrics.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation has been published, users should monitor Totolink communications for updates. Until a patch is available, restricting access to the device's management interface from untrusted networks may reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-03T08:09:46.636Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f7ff28cbff5d8610969078
Added to database: 5/4/2026, 2:06:32 AM
Last enriched: 5/11/2026, 2:24:48 AM
Last updated: 6/18/2026, 4:56:38 AM
Views: 74
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