Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenti
Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device.
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | ZyWALL/USG series firmware | 4.60 through 4.73 |
| Zyxel | VPN series firmware | 4.60 through 5.35 |
| Zyxel | USG FLEX series firmware | 4.60 through 5.35 |
| Zyxel | ATP series firmware | 4.60 through 5.35 |
Yes — actively exploited. Added to the CISA KEV catalog on 2023-05-31. Ransomware use: Unknown.
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.