CVE-2023-34140
Last modified
CVE-2023-34140 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 through 5.36 Patch 2, USG FLEX series firmware versions 4.50 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 4.16 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 4.16 through 5.36 Patch 2, VPN series firmware versions 4.30 through 5.36 Patch 2, NXC2500 firmware versions 6.10(AAIG.0) through 6.10(AAIG.3), and NXC5500 firmware versions 6.10(AAOS.0) through 6.10(AAOS.4), could allow an unauthenticated, LAN-based attacker to cause denial of service (DoS) conditions by sending a crafted request to the CAPWAP daemon.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
Description
A buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 through 5.36 Patch 2, USG FLEX series firmware versions 4.50 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 4.16 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 4.16 through 5.36 Patch 2, VPN series firmware versions 4.30 through 5.36 Patch 2, NXC2500 firmware versions 6.10(AAIG.0) through 6.10(AAIG.3), and NXC5500 firmware versions 6.10(AAOS.0) through 6.10(AAOS.4), could allow an unauthenticated, LAN-based attacker to cause denial of service (DoS) conditions by sending a crafted request to the CAPWAP daemon.
Metrics
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | Usg 20w-Vpn Firmware | >= 4.16, < 5.37 |
| Zyxel | Usg 2200-Vpn Firmware | >= 4.30, < 5.37 |
| Zyxel | Usg Flex 100 Firmware | >= 4.50, < 5.37 |
| Zyxel | Usg Flex 100w Firmware | >= 4.50, < 5.37 |
| Zyxel | Usg Flex 200 Firmware | >= 4.50, < 5.37 |
| Zyxel | Usg Flex 50 Firmware | >= 4.50, < 5.37 |
| Zyxel | Usg Flex 500 Firmware | >= 4.50, < 5.37 |
| Zyxel | Usg Flex 50w Firmware | >= 4.50, < 5.37 |
| Zyxel | Usg Flex 700 Firmware | >= 4.50, < 5.37 |
| Zyxel | Zywall Atp100 Firmware | >= 4.32, < 5.37 |
| Zyxel | Zywall Atp100w Firmware | >= 4.32, < 5.37 |
| Zyxel | Zywall Atp200 Firmware | >= 4.32, < 5.37 |
| Zyxel | Zywall Atp500 Firmware | >= 4.32, < 5.37 |
| Zyxel | Zywall Atp700 Firmware | >= 4.32, < 5.37 |
| Zyxel | Zywall Atp800 Firmware | >= 4.32, < 5.37 |
| Zyxel | Zywall Vpn100 Firmware | >= 4.30, < 5.37 |
| Zyxel | Zywall Vpn2s Firmware | >= 4.30, < 5.37 |
| Zyxel | Zywall Vpn300 Firmware | >= 4.30, < 5.37 |
| Zyxel | Zywall Vpn50 Firmware | >= 4.30, < 5.37 |
| Zyxel | Zywall Vpn 100 Firmware | >= 4.30, < 5.37 |
| Zyxel | Zywall Vpn 300 Firmware | >= 4.30, < 5.37 |
| Zyxel | Zywall Vpn 50 Firmware | >= 4.30, < 5.37 |
| Zyxel | Nxc2500 Firmware | >= 6.10\(aaig.0\), <= 6.10\(aaig.3\) |
| Zyxel | Nxc5500 Firmware | >= 6.10\(aaos.0\), <= 6.10\(aaos.4\) |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-34140?
How severe is CVE-2023-34140?
How do I fix CVE-2023-34140?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2023
- CVE-2023-34135Path Traversal vulnerability in SonicWall GMS and Analytics …6.5
- CVE-2023-34136Vulnerability in SonicWall GMS and Analytics allows unauthen…9.8
- CVE-2023-34137SonicWall GMS and Analytics CAS Web Services application use…9.8
- CVE-2023-34138A command injection vulnerability in the hotspot management …8
- CVE-2023-34139A command injection vulnerability in the Free Time WiFi hots…8.8
- CVE-2023-3414A cross-site request forgery vulnerability exists in version…6.5
- CVE-2023-34141A command injection vulnerability in the access point (AP) m…8
- CVE-2023-34142Cleartext Transmission of Sensitive Information vulnerabilit…7.5
- CVE-2023-34143Improper Validation of Certificate with Host Mismatch vulner…8.1
- CVE-2023-34144An untrusted search path vulnerability in the Trend Micro Ap…7.8
- CVE-2023-34145An untrusted search path vulnerability in the Trend Micro Ap…7.8
- CVE-2023-34146An exposed dangerous function vulnerability in the Trend Mic…7.8
Are you affected by CVE-2023-34140?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST