Zyxel_Tobias  Zyxel Employee

@USG_User No Problem. You can switch back to Patch 1 or keep the Signature Version. The Signature Version is build on our latest Weekly from Bug-Fix Level, so a bit better on fix level as Patch 1. However, the next release on ZLD is planned around end of March and will be 5.40. Thanks.

@USG_User There is nothing planned and also no need. The V5.39(ABWD.1)-sig-20250124 only assist in removing the bad signature from partition, that´s it. Once this is done, you can keep this firmware or you can install last official current FCS. As the issue was NEVER firmware related, there is no need to plan a Patch 2 for…

@mocr Bot Versions are good and you can enable Auto Update. Only Version "123" in the end was affected. You have "102" in the end of both, so fine.

@DavideMauri Application Signature Download is separated between partitions. The affected Partition is the Running Partition first. If you follow the SOP, then you´ll "Reset" on Running, you´ll do FTP Upgrade on Running with Weekly to fix it, so NO NEED to do anything on Standby Partition. But we have some customer sharing…

@TCInformatique "Alternative procedure to resolve the "USG FLEX / ATP Series - Recovery Steps for Application Signature Issue" from January 24th: Restart the firewall. Quickly reconnect to the management interface. Go to the "Firmware Management" section. Select the second boot option ("Second Boot"). Reconnect again and…

Yes, this can´t work to recover, if you are affected by today issue a special firmware is required, please follow these steps: https://support.zyxel.eu/hc/en-us/articles/24159250192658

The issue can´t be fixed by FTP. Automatic Daily firmware will NOT fix the issue if you are affected, then console firmware is required. If you are NOT affected, no action needed.

Hello Martin! The steps are shared above and we have tested all other potential ways like Web Interface, SSH and also FTP without success or unexpected side-affects, so please follow the shared solution.

@GIOMIND Please provide HTTPS access as Admin by private message, to check it.

David, please do same step as I suggest to Tibasoft

We can assist to fix this, please send me HTTPS Admin Access via Private Message or contact us through https://support.zyxel.eu and send me Ticket Number in PM.

Please don´t use workaround for now, it may make more trouble in future :) We will update this thread quite soon with better solution steps.

Hi! We are aware of the issue and we are working on a fix. Next update in around 1h. Thanks. Tobias

Hallo Sandra, bitte öffnen Sie hier ein Support Ticket: https://support.zyxel.eu/hc/de/articles/360014020440-Wie-kontaktiere-ich-das-Support-Team- Danke. Tobias

@bymusty The devices need 5.21 Patch 1 before reboot, Signature 1.0.0.20220316.0 can´t upgrade to devices with the affected version. Devices not getting error signatures to have no issues by the 316 version.