Critical severity · published Nov 27, 2020
CVE-2020-25014
A stack-based buffer overflow in fbwifi_continue.cgi on Zyxel UTM and VPN series of gateways running firmware version V4.30 through to V4.55 allows remote unauthenticated…
9.8
CVSS
4.4%
EPSS
No
On KEV
Description
A stack-based buffer overflow in fbwifi_continue.cgi on Zyxel UTM and VPN series of gateways running firmware version V4.30 through to V4.55 allows remote unauthenticated attackers to execute arbitrary code via a crafted http packet.
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)4.4% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AP
Access Points Firmware · Zyxel
through 6.10; 6.10; 6.10; 6.10; 6.10; 6.10; +34 more · source: NVD
ZL
Zld · Zyxel
4.30 through 4.55; 4.30 through 4.55; 4.30 through 4.55; 4.30 through 4.55; 4.30 through 4.55; 4.30 through 4.55; +28 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-25014
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-25014
Release Notes
https://businessforum.zyxel.com/categories/security-news-and-release
Vendor Advisory
https://www.zyxel.com/support/Zyxel-security-advisory-for-buffer-overflow-vulnerability.shtml