CVE-2022-27003
Published: 15 March 2022
Summary
CVE-2022-27003 is a critical-severity OS Command Injection (CWE-78) vulnerability in Totolink X5000R Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 5.0% 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 X5000R V9.1.0u.6118_B20201102 and A7000R V9.1.0u.6115_B20201022 routers contain a command-injection vulnerability in the Tunnel 6rd function that is triggered through the relay6rd parameter. The flaw is tracked as CVE-2022-27003, carries a CVSS 3.1 score of 9.8, and is classified under CWE-78.
An unauthenticated attacker can send a crafted network request to the affected devices and achieve arbitrary command execution with full system privileges. No user interaction or prior authentication is required, enabling remote takeover of the router.
Public references consist of technical write-ups that demonstrate the injection vector but contain no vendor advisories or patch information. The EPSS score rose from a low baseline to a peak of 0.3065 on 2025-12-11 before receding to its current value of 0.1638, indicating a period of increased exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-31543
Vulnerability details
Totolink routers s X5000R V9.1.0u.6118_B20201102 and A7000R V9.1.0u.6115_B20201022 were discovered to contain a command injection vulnerability in the Tunnel 6rd function via the relay6rd parameter. This vulnerability allows attackers to execute arbitrary commands via a crafted request.
- 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.