CVE-2023-28771
CRITICAL KEVZyxel ZyWALL/USG <4.73 - RCE
Title source: llmDescription
Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device.
Exploits (7)
nomisec
WORKING POC
30 stars
by benjaminhays · poc
https://github.com/benjaminhays/CVE-2023-28771-PoC
metasploit
WORKING POC
GREAT
by sf · rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/misc/zyxel_ike_decoder_rce_cve_2023_28771.rb
References (3)
Scores
CVSS v3
9.8
EPSS
0.9435
EPSS Percentile
100.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CISA KEV
2023-05-31
VulnCheck KEV
2023-05-25
InTheWild.io
2023-05-31
ENISA EUVD
EUVD-2023-32406
CWE
CWE-78
Status
published
Products (21)
zyxel/atp100_firmware
4.60 - 5.36
zyxel/atp100w_firmware
4.60 - 5.35
zyxel/atp200_firmware
4.60 - 5.36
zyxel/atp500_firmware
4.60 - 5.36
zyxel/atp700_firmware
4.60 - 5.36
zyxel/atp800_firmware
4.60 - 5.36
zyxel/usg_flex_100_firmware
4.60 - 5.36
zyxel/usg_flex_100w_firmware
4.60 - 5.36
zyxel/usg_flex_200_firmware
4.60 - 5.36
zyxel/usg_flex_500_firmware
4.60 - 5.36
... and 11 more
Published
Apr 25, 2023
KEV Added
May 31, 2023
Tracked Since
Feb 18, 2026