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 Firmware | >=4.32<=5.37 | |
| Any of | ||
| Zyxel ATP100 Firmware | ||
| Zyxel ATP100W Firmware | ||
| Zyxel Zywall ATP200 | ||
| Zyxel ATP500 Firmware | ||
| Zyxel ATP700 Firmware | ||
| Zyxel ATP series 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-2023-35136?
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.
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- collector/mitre-cve
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- agent/last-modified-date
- 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 atp series 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