CVE-2023-6399: zyxel atp series firmware
Vulnerability summary
CVE-2023-6399 is a medium (CVSS 6.5) vulnerability in zyxel atp series firmware. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.1% of scored vulnerabilities.
Timeline
- 20-02-2024PublishedVulnerability first disclosed.
- 02-08-2024Last modifiedVulnerability information updated.
Description
A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1, and USG FLEX H series firmware versions from 1.10 through 1.10 Patch 1 could allow an authenticated IPSec VPN user to cause DoS conditions against the “deviceid” daemon by sending a crafted hostname to an affected device if it has the “Device Insight” feature enabled.
CVSS metrics
2 scores · 2 sources · 1 version- CVE.orgCNA5.7MediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.65%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
0.00 pp
From 0.65% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Zyxel27 products
- atp series firmwareversion 4.32 through 5.37 Patch 1
- atp100_firmware≥ 5.10, < 5.37 | 5.37 | 5.37:patch1
- atp100w_firmware≥ 5.10, < 5.37 | 5.37 | 5.37:patch1
- atp200_firmware≥ 5.10, < 5.37 | 5.37 | 5.37:patch1
- atp500_firmware≥ 5.10, < 5.37 | 5.37 | 5.37:patch1
1 vendor · 27 products
References
1 links- www.zyxel.com/global/…Vendor Advisory