Critical severity · published Jan 11, 2023
CVE-2022-43389
A buffer overflow vulnerability in the library of the web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an unauthenticated attacker to execute some…
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
A buffer overflow vulnerability in the library of the web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EF
Ep240p Firmware · Zyxel
All versions, or not specified · source: NVD
LF
Lte3202-m437 Firmware · Zyxel
before 1.00\(abwf.1\)c0 · source: NVD
LF
Lte3316-m604 Firmware · Zyxel
before 2.00\(abmp.6\)c0 · source: NVD
LF
Lte7480-m804 Firmware · Zyxel
before 1.00\(abra.6\)c0 · source: NVD
LF
Lte7490-m904 Firmware · Zyxel
before 1.00\(abqy.5\)c0 · source: NVD
NF
Nebula Fwa510 Firmware · Zyxel
before 1.15\(acgd.3\)c0 · source: NVD
NF
Nebula Fwa710 Firmware · Zyxel
before 1.15\(acgc.3\)c0 · source: NVD
NN
Nebula Nr7101 Firmware · Zyxel
before 1.15\(accc.3\)c0 · source: NVD
NF
Nr5103 Firmware · Zyxel
before 4.19\(abyc.3\)c0 · source: NVD
NF
Nr5103e Firmware · Zyxel
All versions, or not specified · source: NVD
NF
Nr7101 Firmware · Zyxel
before 1.00\(abuv.7\)c0 · source: NVD
NF
Nr7102 Firmware · Zyxel
before 1.00\(abyd.2\)c0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-43389
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-43389
Vendor Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-buffer-overflow-vulnerabilities-of-cpe-fiber-onts-and-wifi-extenders
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