The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware vers
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
- Fix
- Fixed in V5.21(AAZF.14)C0, V5.21(AATB.11)C0, V5.21(ABAG.11)C0
- 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
The software affected is the firmware for Zyxel NAS326, NAS540, and NAS542 network-attached storage devices. An unauthenticated remote attacker could exploit this flaw by sending a specially crafted HTTP request to run operating system commands on the device.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5.21(AATB.11)C0, and NAS542 firmware versions prior to V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request.
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 NAS326 firmware
fixed in V5.21(AAZF.14)C0
- Zyxel NAS540 firmware
fixed in V5.21(AATB.11)C0
- Zyxel NAS542 firmware
fixed in V5.21(ABAG.11)C0