CVE-2026-5153
Published: 30 March 2026
Summary
CVE-2026-5153 is a medium-severity Injection (CWE-74) vulnerability in Tenda Ch22 Firmware. Its CVSS base score is 5.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 14.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
A command injection vulnerability has been identified in Tenda CH22 firmware version 1.0.0.1. The flaw resides in the FormWriteFacMac function of the /goform/WriteFacMac endpoint, where improper handling of the mac argument enables an attacker to inject arbitrary commands. The issue is tracked under CWE-74 and CWE-77 and carries a CVSS 4.0 score of 5.3.
Remote attackers with low privileges can exploit the flaw over the network without user interaction to execute commands on the device. Public exploit code has been released, allowing unauthenticated or low-privileged parties to achieve limited control over the affected router.
The EPSS score rose from a low baseline to a peak of 0.0273 on the day after disclosure before receding to 0.0090, indicating a brief but noticeable increase in exploitation interest following publication. No vendor advisory or patch information is provided in the available references.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-17243
Vulnerability details
A flaw has been found in Tenda CH22 1.0.0.1. The affected element is the function FormWriteFacMac of the file /goform/WriteFacMac. Executing a manipulation of the argument mac can lead to command injection. The attack may be launched remotely. The exploit…
more
has been published and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CVE enables remote command injection via public-facing web interface (T1190) on network device firmware, facilitating arbitrary command execution akin to Network Device CLI abuse (T1059.008).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires validation of inputs like the 'mac' argument in /goform/WriteFacMac to neutralize special elements and prevent command injection.
Mandates identification, reporting, and correction of known flaws such as this command injection vulnerability through timely patching of the Tenda CH22 firmware.
Vulnerability scanning identifies command injection flaws like CVE-2026-5153 in the FormWriteFacMac function during periodic assessments.