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 f
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Zyxel USG FLEX, USG20(W)-VPN, ATP, and VPN series firewall and VPN gateway devices are affected. An attacker could exploit this flaw to modify certain files and run operating system commands on the affected device.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original 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.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Zyxel USG FLEX 100(W) firmware
5.00 through 5.21 Patch 1
- Zyxel USG FLEX 200 firmware
5.00 through 5.21 Patch 1
- Zyxel USG FLEX 500 firmware
5.00 through 5.21 Patch 1
- Zyxel USG FLEX 700 firmware
5.00 through 5.21 Patch 1
- Zyxel ATP series firmware
5.10 through 5.21 Patch 1
- Zyxel VPN series firmware
4.60 through 5.21 Patch 1
- Zyxel USG FLEX 50(W) firmware
5.10 through 5.21 Patch 1
- Zyxel USG 20(W)-VPN firmware
5.10 through 5.21 Patch 1