Buffer overflow in Zyxel Atp Series Firmware
CVE-2023-34140
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)-…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (33.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Zyxel Atp Series Firmware — versions 4.32 through 5.36 Patch 2
- Zyxel Nxc2500 Firmware — versions 6.10(AAIG.0) through 6.10(AAIG.3)
- Zyxel Nxc5500 Firmware — versions 6.10(AAOS.0) through 6.10(AAOS.4)
- Zyxel Usg20(w)-vpn Series Firmware — versions 4.16 through 5.36 Patch 2
- Zyxel Usg Flex 50(w) Series Firmware — versions 4.16 through 5.36 Patch 2
- Zyxel Usg Flex Series Firmware — versions 4.50 through 5.36 Patch 2
- Zyxel Vpn Series Firmware — versions 4.30 through 5.36 Patch 2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2023-34140?
- CVE-2023-34140 is a medium-severity vulnerability in Zyxel Atp Series Firmware, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2023-07-17.
- How severe is CVE-2023-34140?
- Medium severity. CVSS v3 base score is 6.5 out of 10.