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 P
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,
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | ATP series firmware | version 4.32 through 5.37 Patch 1 |
| Zyxel | USG FLEX series firmware | version 4.50 through 5.37 Patch 1 |
| Zyxel | USG FLEX 50(W) series firmware | version 4.16 through 5.37 Patch 1 |
| Zyxel | USG20(W) | VPN series firmware — version 4.16 through 5.37 Patch 1 |
| Zyxel | NWA50AX firmware | < 6.29(ABYW.4) |
| Zyxel | WAC500 firmware | < 6.70(ABVS.1) |
| Zyxel | WAX300H firmware | < 6.70(ACHF.1) |
| Zyxel | WBE660S firmware | < 6.70(ACGG.1) |
| Zyxel | USG FLEX H series firmware | version 1.10 through 1.10 Patch 1 |
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
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No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.