# OS command injection in Zyxel ATP series firmware and others

CVE record · `CVE-2023-6398`

- **Identifiers:** `CVE-2023-6398`
- **State:** Confirmed
- **Severity:** CVSS 7.2 High
- **Critical:** No
- **CNA:** Zyxel
- **Weakness (CWE):** [CWE-78](https://cwe.mitre.org/data/definitions/78.html)
- **Tags:** [Command injection](https://agentprime.io/advisories/tag/command-injection.md)
- **Technologies:** [Zyxel ATP series firmware](https://agentprime.io/advisories/technology/zyxel-atp-series-firmware.md) · [Zyxel USG FLEX series firmware](https://agentprime.io/advisories/technology/zyxel-usg-flex-series-firmware.md) · [Zyxel USG FLEX 50(W) series firmware](https://agentprime.io/advisories/technology/zyxel-usg-flex-50-w-series-firmware.md) · [Zyxel USG20(W)-VPN series firmware](https://agentprime.io/advisories/technology/zyxel-usg20-w-vpn-series-firmware.md) · [Zyxel NWA50AX firmware](https://agentprime.io/advisories/technology/zyxel-nwa50ax-firmware.md) · [Zyxel WAC500 firmware](https://agentprime.io/advisories/technology/zyxel-wac500-firmware.md) · [Zyxel WAX300H firmware](https://agentprime.io/advisories/technology/zyxel-wax300h-firmware.md) · [Zyxel WBE660S firmware](https://agentprime.io/advisories/technology/zyxel-wbe660s-firmware.md) · [Zyxel USG FLEX H series firmware](https://agentprime.io/advisories/technology/zyxel-usg-flex-h-series-firmware.md)
- **Published:** 20 Feb 2024
- **Updated:** 25 Aug 2024
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Zyxel) at 20 Feb 2024, 01:34 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Zyxel. Product: ATP series firmware.
  - affected: `version 4.32 through 5.37 Patch 1`
  - Other versions: unaffected
- Vendor: Zyxel. Product: USG FLEX series firmware.
  - affected: `version 4.50 through 5.37 Patch 1`
  - Other versions: unaffected
- Vendor: Zyxel. Product: USG FLEX 50(W) series firmware.
  - affected: `version 4.16 through 5.37 Patch 1`
  - Other versions: unaffected
- Vendor: Zyxel. Product: USG20(W)-VPN series firmware.
  - affected: `version 4.16 through 5.37 Patch 1`
  - Other versions: unaffected
- Vendor: Zyxel. Product: NWA50AX firmware.
  - affected: `< 6.29(ABYW.4)`
  - Other versions: unaffected
- Vendor: Zyxel. Product: WAC500 firmware.
  - affected: `< 6.70(ABVS.1)`
  - Other versions: unaffected
- Vendor: Zyxel. Product: WAX300H firmware.
  - affected: `< 6.70(ACHF.1)`
  - Other versions: unaffected
- Vendor: Zyxel. Product: WBE660S firmware.
  - affected: `< 6.70(ACGG.1)`
  - Other versions: unaffected
- Vendor: Zyxel. Product: USG FLEX H series firmware.
  - affected: `version 1.10 through 1.10 Patch 1`
  - Other versions: unaffected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.2 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`, from CNA (Zyxel)

- **CISA KEV:** Not listed.
- **EPSS:** 0.013, the 71st percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 20 Feb 2024. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2023-6398](https://www.cve.org/CVERecord?id=CVE-2023-6398)
- [NVD: CVE-2023-6398](https://nvd.nist.gov/vuln/detail/CVE-2023-6398)

### References from the CNA

- <https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024> (vendor-advisory)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2023-6398>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2023-6398/>. Everything for agents: <https://agentprime.io/llms.txt>.