CVE-2023-35136: Input Validation
First published: Tue Nov 28 2023(Updated: )
An improper input validation vulnerability in the “Quagga” package of 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 access configuration files on an affected device.
Credit: security@zyxel.com.tw
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| Zyxel Zld | >=4.32<=5.37 | |
| Any of | ||
| Zyxel Multiple Network-Attached Storage (NAS) Devices | ||
| Zyxel Atp100w | ||
| Zyxel ATP200 | ||
| Zyxel Atp500 | ||
| Zyxel Atp700 | ||
| Zyxel Atp800 | ||
| All of | ||
| Zyxel Zld | >=4.50<=5.37 | |
| Any of | ||
| Zyxel Usg Flex 100 | ||
| Zyxel Usg Flex 100w | ||
| Zyxel Usg Flex 200 | ||
| Zyxel Usg Flex 50 | ||
| Zyxel Usg Flex 500 | ||
| Zyxel Usg Flex 50w | ||
| Zyxel Usg Flex 700 | ||
| All of | ||
| Zyxel Zld | >=4.16<=5.37 | |
| Any of | ||
| Zyxel Usg 20w-vpn | ||
| Zyxel Vpn50w | ||
| All of | ||
| Zyxel Zld | >=4.30<=5.37 | |
| Any of | ||
| Zyxel Vpn100 | ||
| Zyxel Multiple Network-Attached Storage (NAS) Devices | ||
| Zyxel Vpn300 | ||
| Zyxel Vpn50 |
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Reference Links
Frequently Asked Questions
What is CVE-2023-35136?
CVE-2023-35136 is an improper input validation vulnerability in the “Quagga” package of the Zyxel ATP series firmware.
Which Zyxel products are affected by CVE-2023-35136?
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, and USG20(W)-VPN series firmware versions 4.16 through 5.37 are affected by CVE-2023-35136.
What is the severity of CVE-2023-35136?
CVE-2023-35136 has a severity rating of medium with a CVSS score of 5.5.
How can I fix CVE-2023-35136?
To fix CVE-2023-35136, update the firmware of the affected Zyxel products to versions 5.37 (for ATP series), 5.37 (for USG FLEX series), 5.37 (for USG FLEX 50(W) series), or 5.37 (for USG20(W)-VPN series).
Where can I find more information about CVE-2023-35136?
You can find more information about CVE-2023-35136 in the Zyxel Security Advisory for Multiple Vulnerabilities in Firewalls and APs.
- collector/nvd-api
- agent/type
- agent/weakness
- agent/severity
- agent/references
- agent/author
- agent/event
- agent/description
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- agent/tags
- collector/mitre-cve
- source/MITRE
- vendor/zyxel
- canonical/zyxel zld
- version/zyxel zld/4.32
- version/zyxel zld/5.37
- canonical/zyxel multiple network-attached storage (nas) devices
- canonical/zyxel atp100w
- canonical/zyxel atp200
- canonical/zyxel atp500
- canonical/zyxel atp700
- canonical/zyxel atp800
- version/zyxel zld/4.50
- canonical/zyxel usg flex 100
- canonical/zyxel usg flex 100w
- canonical/zyxel usg flex 200
- canonical/zyxel usg flex 50
- canonical/zyxel usg flex 500
- canonical/zyxel usg flex 50w
- canonical/zyxel usg flex 700
- version/zyxel zld/4.16
- canonical/zyxel usg 20w-vpn
- canonical/zyxel vpn50w
- version/zyxel zld/4.30
- canonical/zyxel vpn100
- canonical/zyxel vpn300
- canonical/zyxel vpn50