Exploited vulnerability · CISA KEV

Is CVE-2022-30525 exploited? Yes: in CISA KEV since 16 May 2022

Gociux · Zyxel Multiple Firewalls · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-30525, Zyxel Multiple Firewalls OS Command Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 16 May 2022, 4 days after it was published. It affects Zyxel Multiple Firewalls, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply updates per vendor instructions.

What it 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.

What to do

1. Check whether you run it. Look for Multiple Firewalls in your asset inventory, including appliances and cloud images. Stack check lists every exploited Zyxel CVE at once.
2. Apply the fix. Apply updates per vendor instructions.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 12 May 2022.
4. Get told next time. Email alerts when CISA adds a CVE for Zyxel.

Other exploited CVEs in Multiple Firewalls

• CVE-2024-11667: Zyxel Multiple Firewalls Path Traversal Vulnerability (3 Dec 2024)
• CVE-2023-33009: Zyxel Multiple Firewalls Buffer Overflow Vulnerability (5 Jun 2023)
• CVE-2023-33010: Zyxel Multiple Firewalls Buffer Overflow Vulnerability (5 Jun 2023)
• CVE-2023-28771: Zyxel Multiple Firewalls OS Command Injection Vulnerability (31 May 2023)

References

• nvd.nist.gov/vuln/detail/CVE-2022-30525

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in May 2022 · Zyxel scorecard · act-now radar.