Buffer overflow in Zyxel Atp100
CVE-2024-6343
A buffer overflow vulnerability in the CGI program of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V4.16 through V5.38, and USG20(W)-VPN series firmware versions from V4.16 through V5.38 could allow an authenticated attacker with administrator privileges to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Zyxel Atp100
- Zyxel Atp100w
- Zyxel Atp200
- Zyxel Atp500
- Zyxel Atp700
- Zyxel Atp800
- Zyxel Atp Series Firmware — versions versions V4.32 through V5.38
- Zyxel Usg 20w-Vpn
- Zyxel Usg20(w)-Vpn Series Firmware — versions versions V4.16 through V5.38
- Zyxel Usg Flex 100
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2024-6343?
- CVE-2024-6343 is a medium-severity vulnerability in Zyxel Atp100, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 4.9/10. Published 2024-09-03.
- How severe is CVE-2024-6343?
- Medium severity. CVSS v3 base score is 4.9 out of 10.
- Is CVE-2024-6343 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.