CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVE-2023-6399
Medium (6.5) in zyxel. EPSS 0.6% chance of exploitation in the next 30 days.
A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1, and USG FLEX H series firmware versions from 1.10 through 1.10 Patch 1 could allow an authenticated IPSec VPN user to cause DoS conditions against the “deviceid” daemon by sending a crafted hostname to an affected device if it has the “Device Insight” feature enabled.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-31)
- CWE
- CWE-134
- Published
- Modified
- Record from
- the NVD, synced
Affected
- zyxel:atp100_firmware
- zyxel:atp100w_firmware
- zyxel:atp200_firmware
- zyxel:atp500_firmware
- zyxel:atp700_firmware
- zyxel:atp800_firmware
- zyxel:uos
- zyxel:usg20-vpn_firmware
- zyxel:usg20w-vpn_firmware
- zyxel:usg_flex_100_firmware
- zyxel:usg_flex_100ax_firmware
- zyxel:usg_flex_100h_firmware
- zyxel:usg_flex_100w_firmware
- zyxel:usg_flex_200_firmware
- zyxel:usg_flex_200h_firmware
- zyxel:usg_flex_200hp_firmware
- zyxel:usg_flex_500_firmware
- zyxel:usg_flex_500h_firmware
- zyxel:usg_flex_50_firmware
- zyxel:usg_flex_50w_firmware
- zyxel:usg_flex_700_firmware
- zyxel:usg_flex_700h_firmware