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Comtrend VR-3033 routers running firmware DE11-416SSG-C01_R02.A2pvI042j1.d26m were found to contain multiple authenticated command injection flaws in the web administration interface’s diagnostic ping and traceroute functions. The issue, tracked as CVE-2020-10173, allows a user with valid access to the router interface to inject shell metacharacters through the pingIpAddress parameter handled by ping.cgi, leading to arbitrary command execution on the device.
A public proof of concept demonstrated the bug by sending a crafted request that appended shell commands and returned directory listings from the router, confirming remote command execution through the diagnostics page. The disclosure identified bootloader version 1.0.38-116.228-1, noted that similar weaknesses may affect other Comtrend models, and said the researcher reported the issue to the vendor before publishing after receiving no response.
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MITRE published CVE-2020-10173 for multiple authenticated command injection vulnerabilities in Comtrend VR-3033 devices. The CVE describes flaws in the ping and traceroute diagnostic pages and references the public Exploit-DB entry.
A public disclosure and proof of concept for the Comtrend VR-3033 authenticated command injection vulnerability was released on Exploit-DB. The write-up demonstrated arbitrary command execution through /ping.cgi using shell metacharacters in the pingIpAddress parameter.
The Exploit-DB reference states the authenticated command injection flaw in Comtrend VR-3033 diagnostic ping and traceroute functions was sent to the vendor. The issue affects firmware DE11-416SSG-C01_R02.A2pvI042j1.d26m and allows command execution via the pingIpAddress parameter.
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Two critical vulnerabilities, **CVE-2026-5851** and **CVE-2026-5976**, were disclosed in the **Totolink A7100RU** router running firmware `7.4cu.2313_b20191024`, exposing the device to remote **OS command injection** without authentication or user interaction. Both flaws affect `/cgi-bin/cstecgi.cgi` in the router's CGI handler: CVE-2026-5851 is tied to the `setUPnPCfg` function through the `enable` argument, while CVE-2026-5976 affects the `setStorageCfg` function through the `sambaEnabled` argument. The vulnerabilities were classified under **CWE-78** and **CWE-77** and were assigned high to critical severity across CVSS versions, reflecting potential compromise of confidentiality, integrity, and availability. Public exploit information has reportedly been released, including references to **VulDB** and a **GitHub** disclosure repository, increasing the likelihood of exploitation against exposed devices that have not been updated or otherwise mitigated.
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Three critical vulnerabilities, **CVE-2026-7121**, **CVE-2026-7122**, and **CVE-2026-7125**, were disclosed in the **Totolink A8000RU** router running firmware `7.1cu.643_b20200521`, all affecting the `/cgi-bin/cstecgi.cgi` CGI handler. The flaws are OS command injection issues in the `setWizardCfg`, `setUPnPCfg`, and `setWiFiEasyCfg` functions, where crafted input to the `wizard`, `enable`, and `merge` arguments can trigger command execution on the device. The vulnerabilities are mapped to **CWE-78** and **CWE-77** and were rated critical across **CVSS v2**, **CVSS v3.1**, and **CVSS v4.0** scoring schemes. All three issues are remotely exploitable over the network and require **no privileges** and **no user interaction**, creating a high-risk exposure for internet-accessible devices. Public exploit information has already been disclosed, with references including VulDB entries and a GitHub proof-of-concept, increasing the likelihood of near-term exploitation. The disclosures indicate that multiple administrative configuration paths in the router's web interface can be abused for remote code execution, making unpatched A8000RU systems a priority for immediate review and remediation.
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