RCE in Cypress 200
CVE-2021-47745
Cypress Solutions CTM-200 2.7.1 contains an authenticated command injection vulnerability in the firmware upgrade script that allows remote attackers to execute shell commands. Attackers can exploit the 'fw_url' parameter in the ctm-config-upgrade.sh script to inject and execute arbitrary commands with root privileges.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.013 (70.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.013 · change: -0.000
Affected products
- Cypress 200 — versions 2.7.1
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50408 (exploit)
- www.cypress.bc.ca (product)
- www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5687.php (third-party-advisory)
- www.vulncheck.com/advisories/cypress-solutions-ctm-root-remote-os-command-injec… (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47745?
- CVE-2021-47745 is a high-severity vulnerability in Cypress 200, classified under OS Command Injection. CVSS score: 8.8/10. Published 2025-12-31.
- How severe is CVE-2021-47745?
- High severity. CVSS v3 base score is 8.8 out of 10.