Multiple vulnerabilitiesin Zyxel firewalls and APs
Security Bulletin
This security bulletin contains information about 6 vulnerabilities.
1) Command Injection
EUVDB-ID: #VU75462
Risk: Medium
CVSSv3.1:
CVE-ID: CVE-2023-22913
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote attacker to execute arbitrary commands on the target system.
The vulnerability exists due to improper input validation in the "account_operator.cgi" CGI program. A remote user can pass specially crafted data to the application and execute arbitrary commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsUSG FLEX series: 4.50 - 5.35
VPN series: 4.30 - 5.35
Fixed software versionsCPE2.3 External links
Q & A
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?
2) Path traversal
EUVDB-ID: #VU75463
Risk: Low
CVSSv3.1:
CVE-ID: CVE-2023-22914
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in the "account_print.cgi" CGI program. A remote administrator can send a specially crafted HTTP request and read arbitrary files on the system, leading to arbitrary OS commands execution.
MitigationInstall update from vendor's website.
Vulnerable software versionsUSG FLEX series: 4.50 - 5.35
VPN series: 4.30 - 5.35
Fixed software versionsCPE2.3 External links
Q & A
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?
3) Buffer overflow
EUVDB-ID: #VU75464
Risk: Medium
CVSSv3.1:
CVE-ID: CVE-2023-22915
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the "fbwifi_forward.cgi" CGI program. A remote attacker can send a specially crafted HTTP request, trigger memory corruption and cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsUSG FLEX series: 4.50 - 5.35
USG FLEX 50W: 4.30 - 5.35
USG20W-VPN: 4.30 - 5.35
VPN series: 4.30 - 5.35
Fixed software versionsCPE2.3 External links
Q & A
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?
4) Input validation error
EUVDB-ID: #VU75465
Risk: Medium
CVSSv3.1:
CVE-ID: CVE-2023-22916
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in the configuration parser. A remote attacker can trick an administrator to switch the management mode to the cloud mode and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsATP series: 5.10 - 5.35
USG FLEX series: 5.00 - 5.35
USG FLEX 50W: 5.10 - 5.35
USG20W-VPN: 5.10 - 5.35
VPN series: 5.00 - 5.35
Fixed software versionsCPE2.3 External links
Q & A
Can this vulnerability be exploited remotely?
How the attacker can exploit this vulnerability?
Is there known malware, which exploits this vulnerability?
5) Buffer overflow
EUVDB-ID: #VU75466
Risk: Medium
CVSSv3.1:
CVE-ID: CVE-2023-22917
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the "sdwan_iface_ipc" binary. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsATP series: 5.10 - 5.35
USG FLEX series: 5.00 - 5.35
USG FLEX 50W: 5.10 - 5.35
USG20W-VPN: 5.10 - 5.35
VPN series: 5.00 - 5.35
Fixed software versionsCPE2.3 External links
Q & A
Can this vulnerability be exploited remotely?
How the attacker can exploit this vulnerability?
Is there known malware, which exploits this vulnerability?
6) Information disclosure
EUVDB-ID: #VU75467
Risk: Medium
CVSSv3.1:
CVE-ID: CVE-2023-22918
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output by the application in the CGI program. A remote user can gain unauthorized access to sensitive information on the system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsATP series: 4.32 - 5.35
USG FLEX series: 4.50 - 5.35
USG FLEX 50W: 4.16 - 5.35
USG20W-VPN: 4.16 - 5.35
VPN series: 4.30 - 5.35
NAP203: 6.28(ABFA.0)
NAP303: 6.28(ABEX.0)
NAP353: 6.28(ABEY.0)
NWA1123-AC-PRO: 6.28(ABHD.0)
NWA5123-AC HD: 6.25(ABIM.9)
WAC5302D-Sv2: 6.25(ABVZ.9)
WAC6103D-I: 6.28(AAXH.0)
WAC6303D-S: 6.25(ABGL.9)
WAC6502D-E: 6.28(AASD.0)
WAC6502D-S: 6.28(AASE.0)
WAC6503D-S: 6.28(AASF.0)
WAC6552D-S: 6.28(ABIO.0)
WAC6553D-E: 6.28(AASG.0)
NWA110AX: 6.50(ABTG.2)
NWA1123ACv3: 6.50(ABVT.0)
NWA210AX: 6.50(ABTD.2)
NWA220AX-6E: 6.50(ACCO.2)
NWA50AX: 6.29(ABYW.1)
NWA50AX-PRO: 6.50(ACGE.0)
NWA90AX: 6.29(ACCV.1)
NWA90AX-PRO: 6.50(ACGF.0)
WAC500: 6.50(ABVS.0)
WAC500H: 6.50(ABWA.0)
WAX510D: 6.50(ABTF.2)
WAX610D: 6.50(ABTE.2)
WAX620D-6E: 6.50(ACCN.2)
WAX630S: 6.50(ABZD.2)
WAX640S-6E: 6.50(ACCM.2)
WAX650S: 6.50(ABRM.2)
WAX655E: 6.50(ACDO.2)
Fixed software versionsCPE2.3 External links
Q & A
Can this vulnerability be exploited remotely?
How the attacker can exploit this vulnerability?
Is there known malware, which exploits this vulnerability?
