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Two newly disclosed vulnerabilities, CVE-2026-5854 and CVE-2026-5977, affect the Totolink A7100RU router running firmware 7.4cu.2313_b20191024 and allow remote command execution without authentication or user interaction. Both flaws are in the router’s CGI handler at /cgi-bin/cstecgi.cgi: CVE-2026-5854 is tied to the setWiFiEasyCfg function through the merge argument, while CVE-2026-5977 affects setWiFiBasicCfg through the wifiOff argument.
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2 events from the most recent confirmed update back to the earliest known activity.
On 2026-04-10, CVE-2026-5993 was received for Totolink A7100RU firmware 7.4cu.2313_b20191024. The flaw affects the setWiFiGuestCfg function in /cgi-bin/cstecgi.cgi and allows remote OS command injection via the wifiOff argument without privileges or user interaction; public exploit information was noted.
On April 9, 2026, CVE-2026-5854 and CVE-2026-5977 were recorded for Totolink A7100RU firmware 7.4cu.2313_b20191024. The flaws affect the setWiFiEasyCfg and setWiFiBasicCfg functions in /cgi-bin/cstecgi.cgi and allow remote OS command injection without privileges or user interaction; public exploit information was noted.
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Two high-severity vulnerabilities have been disclosed in Totolink routers that allow remote, unauthenticated OS command injection through the CGI handler in `/cgi-bin/cstecgi.cgi`. The flaws affect the **A7100RU** (`CVE-2026-5853`) running firmware `7.4cu.2313_b20191024` and the **A8000RU** (`CVE-2026-7124`) running firmware `7.1cu.643_b20200521`, with both issues tied to the `setIpv6LanCfg` function and abuse of the `addrPrefixLen` argument. The vulnerabilities are mapped to `CWE-78` and `CWE-77` and can be exploited remotely without authentication or user interaction.
Jun 29, 2026
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.
Jun 29, 2026
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.
Jun 29, 2026