CVE-2022-48126
Published: 20 January 2023
Summary
CVE-2022-48126 is a critical-severity OS Command Injection (CWE-78) vulnerability in Totolink A7100Ru Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 5.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
TOTOlink A7100RU routers running firmware version V7.4cu.2313_B20191024 contain an OS command injection vulnerability (CWE-78) in the setting/setOpenVpnCertGenerationCfg function. The flaw is triggered by unsanitized input supplied to the username parameter and carries a CVSS 3.1 score of 9.8, reflecting network-accessible exploitation without authentication or user interaction.
An unauthenticated attacker can submit a crafted HTTP request containing shell metacharacters in the username field, causing the device to execute arbitrary operating-system commands. Successful exploitation grants the attacker full control over the router, including the ability to read or modify configuration data, install persistent malware, or pivot into attached networks.
Public proof-of-concept code demonstrating the injection has been published on GitHub. The EPSS score has remained steady at 0.1490 with no material increase since disclosure. No vendor advisory or firmware update addressing the issue appears among the available references.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-50838
Vulnerability details
TOTOlink A7100RU V7.4cu.2313_B20191024 was discovered to contain a command injection vulnerability via the username parameter in the setting/setOpenVpnCertGenerationCfg function.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.