High severity · published Jul 19, 2022
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…
7.8
CVSS
1.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
Atp100 Firmware · Zyxel
4.32 through 5.30 · source: NVD
AF
Atp100w Firmware · Zyxel
4.32 through 5.30 · source: NVD
AF
Atp200 Firmware · Zyxel
4.32 through 5.30 · source: NVD
AF
Atp500 Firmware · Zyxel
4.32 through 5.30 · source: NVD
AF
Atp700 Firmware · Zyxel
4.32 through 5.30 · source: NVD
AF
Atp800 Firmware · Zyxel
4.32 through 5.30 · source: NVD
U2
Usg 2200-vpn Firmware · Zyxel
4.30 through 5.30 · source: NVD
UF
Usg Flex 100w Firmware · Zyxel
4.50 through 5.30 · source: NVD
UF
Usg Flex 200 Firmware · Zyxel
4.50 through 5.30 · source: NVD
UF
Usg Flex 500 Firmware · Zyxel
4.50 through 5.30 · source: NVD
UF
Usg Flex 50w Firmware · Zyxel
4.16 through 5.30 · source: NVD
UF
Usg Flex 700 Firmware · Zyxel
4.50 through 5.30 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-30526
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-30526
Exploit
http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.html
Vendor Advisory
https://www.zyxel.com/support/Zyxel-security-advisory-authenticated-directory-traversal-vulnerabilities-of-firewalls.shtml
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