CVE-2023-37926: Buffer Overflow
First published: Tue Nov 28 2023(Updated: )
A buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) series firmware versions 4.16 through 5.37, USG20(W)-VPN series firmware versions 4.16 through 5.37, and VPN series firmware versions 4.30 through 5.37, could allow an authenticated local attacker to cause denial-of-service (DoS) conditions by executing the CLI command to dump system logs on an affected device.
Credit: security@zyxel.com.tw
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| Zyxel ZLD Firmware | >=4.32<=5.37 | |
| Any of | ||
| Zyxel ATP100 Firmware | ||
| Zyxel ATP100W Firmware | ||
| Zyxel Zywall ATP200 | ||
| Zyxel ATP500 Firmware | ||
| Zyxel ATP700 Firmware | ||
| Zyxel Zywall ATP800 Firmware | ||
| All of | ||
| Zyxel ZLD Firmware | >=4.50<=5.37 | |
| Any of | ||
| Zyxel USG Flex 100 firmware | ||
| Zyxel USG FLEX 100w firmware | ||
| Zyxel USG FLEX 200 firmware | ||
| Zyxel USG FLEX 50w | ||
| Zyxel USG FLEX 500 firmware | ||
| Zyxel USG FLEX 50(W) series firmware | ||
| Zyxel USG FLEX 700 firmware | ||
| All of | ||
| Zyxel ZLD Firmware | >=4.16<=5.37 | |
| Any of | ||
| Zyxel USG20 | ||
| Zyxel VPN50 | ||
| All of | ||
| Zyxel ZLD Firmware | >=4.30<=5.37 | |
| Any of | ||
| Zyxel Zywall VPN100 | ||
| Zyxel VPN1000 Firmware | ||
| Zyxel Zywall VPN300 | ||
| Zyxel VPN50 Firmware |
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Reference Links
Frequently Asked Questions
What is CVE-2023-37926?
CVE-2023-37926 is a buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 through 5.37.
What is the severity of CVE-2023-37926?
The severity of CVE-2023-37926 is medium (5.5).
Which Zyxel products are affected by CVE-2023-37926?
Zyxel ATP series firmware versions 4.32 through 5.37 are affected by CVE-2023-37926.
How can I fix CVE-2023-37926?
To fix CVE-2023-37926, update your Zyxel ATP series firmware to versions 5.38 or later.
Where can I find more information about CVE-2023-37926?
You can find more information about CVE-2023-37926 in the Zyxel security advisory: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps
- agent/event
- agent/type
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/last-modified-date
- agent/severity
- agent/author
- agent/references
- agent/description
- agent/source
- agent/tags
- agent/softwarecombine
- collector/nvd-api
- agent/software-canonical-lookup-request
- vendor/zyxel
- canonical/zyxel zld firmware
- version/zyxel zld firmware/4.32
- version/zyxel zld firmware/5.37
- canonical/zyxel atp100 firmware
- canonical/zyxel atp100w firmware
- canonical/zyxel zywall atp200
- canonical/zyxel atp500 firmware
- canonical/zyxel atp700 firmware
- canonical/zyxel zywall atp800 firmware
- version/zyxel zld firmware/4.50
- canonical/zyxel usg flex 100 firmware
- canonical/zyxel usg flex 100w firmware
- canonical/zyxel usg flex 200 firmware
- canonical/zyxel usg flex 50w
- canonical/zyxel usg flex 500 firmware
- canonical/zyxel usg flex 50(w) series firmware
- canonical/zyxel usg flex 700 firmware
- version/zyxel zld firmware/4.16
- canonical/zyxel usg20
- canonical/zyxel vpn50
- version/zyxel zld firmware/4.30
- canonical/zyxel zywall vpn100
- canonical/zyxel vpn1000 firmware
- canonical/zyxel zywall vpn300
- canonical/zyxel vpn50 firmware