VulnerabilityModified

CVE-2023-22916

A remote unauthenticated attacker could leverage the vulnerability to modify device configuration data, resulting in DoS conditions on an affected device if the attacker could trick an authorized administrator to switch the management mode to the cloud…

HIGH 8.1EPSS 0.69%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.69%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

The configuration parser of Zyxel ATP series firmware versions 5.10 through 5.35, USG FLEX series firmware versions 5.00 through 5.35, USG FLEX 50(W) firmware versions 5.10 through 5.35, USG20(W)-VPN firmware versions 5.10 through 5.35, and VPN series firmware versions 5.00 through 5.35, which fails to properly sanitize user input. A remote unauthenticated attacker could leverage the vulnerability to modify device configuration data, resulting in DoS conditions on an affected device if the attacker could trick an authorized administrator to switch the management mode to the cloud mode.

CVSS 3.1: 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
EPSS: 0.69% probability · 51th percentile
CISA KEV: Not listed
Weakness: CWE-20
Affected: zyxel/usg flex 100 firmware · zyxel/usg flex 100w firmware · zyxel/usg flex 200 firmware · zyxel/usg flex 50 firmware · zyxel/usg flex 50w firmware · zyxel/usg flex 500 firmware · zyxel/usg flex 700 firmware · zyxel/vpn100 firmware · zyxel/vpn1000 firmware · zyxel/vpn300 firmware · zyxel/vpn50 firmware · zyxel/usg 20w-vpn firmware · zyxel/atp100 firmware · zyxel/atp100w firmware · zyxel/atp200 firmware · zyxel/atp500 firmware · zyxel/atp700 firmware · zyxel/atp800 firmware
Source: security@zyxel.com.tw

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.