CVE-2022-30525
Zyxel Multiple Firewalls: OS Command Injection
As of , CVE-2022-30525 in Zyxel Multiple Firewalls is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 16 May 2022
- US federal deadline
- 6 June 202221 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- 0.18 on 16 May 2022EPSS on the day CISA listed it.
- Public exploit
- 1 Metasploit module and 1 Exploit-DB entry
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
A command injection vulnerability in the CGI program of some Zyxel firewall versions could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.
CISA's description
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.
The CVE record's description, from Zyxel
- CVE published
- 12 May 2022
- Assigned by
- Zyxel
- CVSS
- 9.8 Critical (CVSS 3.1, from the CNA)
- CWE-78
- Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- Exploit-DB published an exploit (EDB-ID 50946).
- The US federal deadline to fix it.
Public exploits
Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.
- Metasploit: Zyxel Firewall ZTP Unauthenticated Command Injectionexploit module, rank excellent
- Exploit-DB: Zyxel USG FLEX 5.21 - OS Command InjectionEDB-ID 50946, 3 June 2022
Multiple Firewalls: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2023-28771OS Command Injection | Zyxel Multiple Firewalls | Patch this weekMetasploit module; EPSS 0.99 | 0.99 | ||
| CVE-2024-11667Path Traversal | Zyxel Multiple Firewalls | Patch this weekRansomware use | 0.03 | ||
| CVE-2023-33009Buffer Overflow | Zyxel Multiple Firewalls | Patch soon | 0.28 | ||
| CVE-2023-33010Buffer Overflow | Zyxel Multiple Firewalls | Patch soon | 0.29 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org