CVE-2023-6398
No exploitation reported by the sources we read.
- Published2024-02-20
- Fixed in5.37 · 5.37_patch1
- WeaknessCWE-78
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
A post-authentication command injection vulnerability in the file upload binary 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, USG FLEX H series firmware versions from 1.10 through 1.10 Patch 1, NWA50AX firmware versions through 6.29(ABYW.3), WAC500 firmware versions through 6.65(ABVS.1), WAX300H firmware versions through 6.60(ACHF.1), and WBE660S firmware versions through 6.65(ACGG.1) could allow an authenticated attacker with administrator privileges to execute some operating system (OS) commands on an affected device via FTP.
Timeline
dates in UTC- 2024-02-2002:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-6398?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-6398?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · CISA-ADP| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.37 | ≥ 4.50, < 5.37 | 5.37 | NVD |
| 5.37 | ≥ 4.50, < 5.37_patch1 | 5.37_patch1 | CISA-ADP |
| 5.37 | = 5.37 | no fix published | NVD |
| 5.37 | ≥ 4.32, ≤ 5.37_patch1 | no fix published | CISA-ADP |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.37 | ≥ 4.50, < 5.37 | 5.37 | NVD |
| 5.37 | ≥ 4.50, < 5.37_patch1 | 5.37_patch1 | CISA-ADP |
| 5.37 | = 5.37 | no fix published | NVD |
| 5.37 | ≥ 4.32, ≤ 5.37_patch1 | no fix published | CISA-ADP |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.37 | ≥ 4.32, < 5.37 | 5.37 | NVD |
| 5.37 | = 5.37 | no fix published | NVD |
| 5.37 | ≥ 4.32, ≤ 5.37_patch1 | no fix published | CISA-ADP |
41 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Zyxel usg flex 200 firmware to 5.37 · 5.37_patch1
Advisories and patches
- www.zyxel.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Published
- 2024-02-20
- Last Modified
- 2026-06-17
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2023-6398?
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