RCE in Zyxel Atp100
CVE-2022-30525
A OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 500 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 700 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 50(W) firmware versions 5.10 through 5.21 Patch 1, USG20(W)-VPN firmware versions 5.10 through 5.21 Patch 1, ATP series firmware versions 5.10 through 5.21 Patch 1, VPN series firmware versions 4.60 through 5.21 Patch 1, which could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.999 (100.0th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.999 · newest: 0.999 · change: 0.000
Affected products
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- www.zyxel.com/support/Zyxel-security-advisory-for-OS-command-injection-vulnerab… (Vendor Advisory)
- packetstormsecurity.com/files/167176/Zyxel-Remote-Command-Execution.html (VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/167182/Zyxel-Firewall-ZTP-Unauthenticated-Command… (Exploit, VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/167372/Zyxel-USG-FLEX-5.21-Command-Injection.html (Exploit, VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escal… (Exploit, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2022-30525?
- CVE-2022-30525 is a critical-severity vulnerability in Zyxel Atp100, classified under OS Command Injection. CVSS score: 9.8/10. Published 2022-05-12.
- How severe is CVE-2022-30525?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-30525 known to be exploited?
- Yes. CVE-2022-30525 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-16), indicating it is being actively exploited. 73 public proof-of-concept repositories are indexed.