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    • ZLD4.73 & ZLD5.36 patch 2 Official Version Released to address Buffer Overflow Issues

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    • Posts: 188  Master Member
      First Comment Friend Collector Fifth Anniversary
      https://community.zyxel.com/en/discussion/comment/52596#Comment_52596

      Hi. Have same issue on ATP 800 and old 1100 devices.

      In my situation help change preshared key on both devices.

      "Helps only change Authentication method on both side. If it was certificate, than change on preshared key, Or vice versa."

      I wrote in topic

      https://community.zyxel.com/en/discussion/2893/ipsec-via-main-gw-stops-work-found-old-outbound-spi-error-in-debug-log
    • Posts: 699  Zyxel Employee
      Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate 100 Answers

      @MarekSK EOL devices (3.30) are not affected.

      @Boiler1976 yes, please upgrade to 4.73Patch which we already provide the downlink in this article.

      @alexey This thread is referring to the urgent buffer issue, we will work on your case in your article thread.

    • Posts: 2
      First Comment Friend Collector

      Hi @nielsscheldeman,

      In my case, I still have the same problem, even if the update is installed, my USG210 firewall keeps blocking the entire network, and I must be disconnecting it from the electricity because I can't access it and my network environment is down.

    • Posts: 1
      First Comment

      Buongiorno,

      Ho problemi con USG20-VPN con la connessione VPN ho provato ad accedere via web al firewall e subito mi propone l'aggiornamento al firmware 5.36 però dopo aver avviato la procedura alla fine l'operazione non va mai a buon fine

      Come posso risolvere?

    • Posts: 2
      First Comment Friend Collector
      https://community.zyxel.com/en/discussion/comment/52908#Comment_52908

      I have the same issue I have FLEX 100 and I updated it to last version but I still have the connection problem it keeps blocking the entire network for example in 1 minute i got disconnected again and again

    • Posts: 2
      First Comment Friend Collector

      We updated our USG FLEX 100 to V5.36(ABUH.2) why we still have connection issues ?

    • Posts: 52  Ally Member
      First Answer First Comment Friend Collector Fifth Anniversary

      I'm getting the 504 Gateway timeout on a USG 20VPN router that had the 5.36 Patch 2 applied last week. I suspect there's another vulnerability or the patch wasn't completely effective. I'll have to do more testing.

    • Posts: 699  Zyxel Employee
      Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Nebula Zyxel Certified Sales Associate 100 Answers

      @electsystech I would like to follow up your case, I've contact you through private message, please check your inbox, thanks

    • Posts: 2
      First Comment Friend Collector

      Hi @Zyxel_James

      In my case, I still have the same problem, even if the update is installed, my USG210 firewall keeps blocking the entire network, and I must be disconnecting it from the electricity because I can't access it and my network environment is down.

      Please contact me

    • Posts: 3
      First Comment First Anniversary

      Hi,

      We are getting the same reports, devices who get unresponsive and need a reboot. Also after 5.36 p2.

      Regards,

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