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CVE-2022-30526: A privilege escalation vulnerability was identified in the CLI command of Zyxel USG FLEX 100(W) firmware versions 4.50 through 5.30, USG FLEX 200 firmware versions 4.50 through 5.30, USG FLEX 500 f...

CVE-2022-30526 · published 4 years ago

Summary

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
zyxel	usg_flex_100w_firmware	>= 4.50, <= 5.30 `cpe:2.3:o:zyxel:usg_flex_100w_firmware::::::::`
zyxel	usg_flex_200_firmware	>= 4.50, <= 5.30 `cpe:2.3:o:zyxel:usg_flex_200_firmware::::::::`
zyxel	usg_flex_500_firmware	>= 4.50, <= 5.30 `cpe:2.3:o:zyxel:usg_flex_500_firmware::::::::`
zyxel	usg_flex_700_firmware	>= 4.50, <= 5.30 `cpe:2.3:o:zyxel:usg_flex_700_firmware::::::::`
zyxel	usg_flex_50w_firmware	>= 4.16, <= 5.30 `cpe:2.3:o:zyxel:usg_flex_50w_firmware::::::::`
zyxel	usg20w-vpn_firmware	>= 4.16, <= 5.30 `cpe:2.3:o:zyxel:usg20w-vpn_firmware::::::::`
zyxel	atp800_firmware	>= 4.32, <= 5.30 `cpe:2.3:o:zyxel:atp800_firmware::::::::`
zyxel	atp700_firmware	>= 4.32, <= 5.30 `cpe:2.3:o:zyxel:atp700_firmware::::::::`
zyxel	atp500_firmware	>= 4.32, <= 5.30 `cpe:2.3:o:zyxel:atp500_firmware::::::::`
zyxel	atp200_firmware	>= 4.32, <= 5.30 `cpe:2.3:o:zyxel:atp200_firmware::::::::`
zyxel	atp100w_firmware	>= 4.32, <= 5.30 `cpe:2.3:o:zyxel:atp100w_firmware::::::::`
zyxel	atp100_firmware	>= 4.32, <= 5.30 `cpe:2.3:o:zyxel:atp100_firmware::::::::`
zyxel	vpn1000_firmware	>= 4.30, <= 5.30 `cpe:2.3:o:zyxel:vpn1000_firmware::::::::`
zyxel	vpn300_firmware	>= 4.30, <= 5.30 `cpe:2.3:o:zyxel:vpn300_firmware::::::::`
zyxel	vpn100_firmware	>= 4.30, <= 5.30 `cpe:2.3:o:zyxel:vpn100_firmware::::::::`
zyxel	vpn50_firmware	>= 4.30, <= 5.30 `cpe:2.3:o:zyxel:vpn50_firmware::::::::`
zyxel	usg20-vpn_firmware	>= 4.30, <= 5.30 `cpe:2.3:o:zyxel:usg20-vpn_firmware::::::::`
zyxel	usg_2200-vpn_firmware	>= 4.30, <= 5.30 `cpe:2.3:o:zyxel:usg_2200-vpn_firmware::::::::`
zyxel	zywall_110_firmware	>= 4.30, <= 5.30 `cpe:2.3:o:zyxel:zywall_110_firmware::::::::`
zyxel	zywall_310_firmware	>= 4.30, <= 5.30 `cpe:2.3:o:zyxel:zywall_310_firmware::::::::`
zyxel	zywall_1100_firmware	>= 4.30, <= 5.30 `cpe:2.3:o:zyxel:zywall_1100_firmware::::::::`
zyxel	usg40_firmware	>= 4.09, <= 4.72 `cpe:2.3:o:zyxel:usg40_firmware::::::::`
zyxel	usg40w_firmware	>= 4.09, <= 4.72 `cpe:2.3:o:zyxel:usg40w_firmware::::::::`
zyxel	usg60_firmware	>= 4.09, <= 4.72 `cpe:2.3:o:zyxel:usg60_firmware::::::::`
zyxel	usg60w_firmware	>= 4.09, <= 4.72 `cpe:2.3:o:zyxel:usg60w_firmware::::::::`

Original advisory text

A privilege escalation vulnerability was identified in the CLI command of Zyxel USG FLEX 100(W) firmware versions 4.50 through 5.30, USG FLEX 200 firmware versions 4.50 through 5.30, USG FLEX 500 firmware versions 4.50 through 5.30, USG FLEX 700 firmware versions 4.50 through 5.30, USG FLEX 50(W) firmware versions 4.16 through 5.30, USG20(W)-VPN firmware versions 4.16 through 5.30, ATP series firmware versions 4.32 through 5.30, VPN series firmware versions 4.30 through 5.30, USG/ZyWALL series firmware versions 4.09 through 4.72, which could allow a local attacker to execute some OS commands with root privileges in some directories on a vulnerable device.

References

http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege... Exploit Third Party Advisory VDB Entry
https://www.zyxel.com/support/Zyxel-security-advisory-authenticated-directory-tr... Vendor Advisory

Fix within

Internet-facing 14 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit (estimated)
Gives an attacker full control (estimated)

Severity

7.8 High

Exploitation

1% chance of attack within 30 days

Type

CWE-269Improper Privilege Management

Timeline

Published19 Jul 2022

Updated4 Nov 2026

First seen29 Sep 2026

Sources

CVE-2022-30526 · NVD

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