Threats / Zyxel / CVE-2022-30525
CVE-2022-30525
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Zyxel Multiple Firewalls vulnerability
Command injection in Zyxel firewall CGI programs allows attackers to execute arbitrary OS commands by modifying files on vulnerable devices.
Verdict
Today item — known-exploited.
A command injection vulnerability in Zyxel firewall CGI implementations enables unauthenticated remote code execution. The high EPSS score and active exploitation in the wild indicate immediate risk to deployed firewall infrastructure.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
697 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-16).
Probability (EPSS)
EPSS 0.99938 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Zyxel, Multiple Firewalls. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-78 OS Command Injection — weakness family: Injection.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious request to the CGI program that injects shell metacharacters into an input parameter.
Business
Firewall perimeter security is compromised, allowing direct access to network infrastructure.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I execute arbitrary OS commands with the privileges of the firewall process to modify system files and configuration.
Business
Attackers gain persistent control over network traffic filtering and can exfiltrate or manipulate data passing through the firewall.
3
Lateral reach — past segmentation narrative 3
Attacker
I establish a foothold to pivot deeper into the protected network or deploy additional malware.
Business
Internal network assets become exposed to lateral movement and secondary compromise of critical systems.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05