Medium severity · published Sep 3, 2024
CVE-2024-6343
A buffer overflow vulnerability in the CGI program of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG…
4.9
CVSS
0.6%
EPSS
No
On KEV
Description
A buffer overflow vulnerability in the CGI program of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V4.16 through V5.38, and USG20(W)-VPN series firmware versions from V4.16 through V5.38 could allow an authenticated attacker with administrator privileges to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
ATP series firmware · Zyxel
versions V4.32 through V5.38 · source: vendor
UF
USG FLEX 50(W) series firmware · Zyxel
versions V4.16 through V5.38 · source: vendor
UF
USG FLEX series firmware · Zyxel
versions V4.50 through V5.38 · source: vendor
US
USG20(W)-VPN series firmware · Zyxel
versions V4.16 through V5.38 · source: vendor
ZL
Zld · Zyxel
4.32 before 5.39; 4.50 before 5.39; 4.16 before 5.39; 4.16 before 5.39 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-6343
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-6343
Vendor Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-09-03-2024
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