Unauthenticated Remote Command Execution Vulnerability in Zyxel Devices
CVE-2023-28771
Key Information:
- Vendor
Zyxel
- Vendor
- CVE Published:
- 25 April 2023
Badges
What is CVE-2023-28771?
Improper handling of error messages in various Zyxel firewall products can enable unauthenticated attackers to send specially crafted packets, potentially allowing the execution of OS commands on the affected devices. This vulnerability can lead to severe implications for network integrity and security as it opens the door for unauthorized remote access. Users of the impacted firmware versions are advised to take immediate action to secure their systems.
CISA has reported CVE-2023-28771
CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2023-28771 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace
The CISA's recommendation is: Apply updates per vendor instructions.
Affected Version(s)
ATP series firmware 4.60 through 5.35
USG FLEX series firmware 4.60 through 5.35
VPN series firmware 4.60 through 5.35
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
References
EPSS Score
99% chance of being exploited in the next 30 days.
CVSS V3.1
Timeline
- 🦅
CISA Reported
- 🟡
Public PoC available
- 👾
Exploit known to exist
Vulnerability published
Vulnerability Reserved