Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Juergen_Mang's avatar
Juergen_Mang
Icon for MVP rankMVP
May 04, 2026
Solved

Errors with AS3 3.56.0 with F5 17.5.1.6

Hi Folks,   I upgraded my Lab F5s to 17.5.1.6 and now my AS3 declarations are not working anymore. I get following error regardless of the declaration, even an empty declaration throws this err...
devops
  • Juergen_Mang's avatar
    Juergen_Mang
    May 18, 2026

    I got a fixed AS3 Version 3.57.0-12 that fixes this issue in my tests.

J-H_Johansen's avatar
J-H_Johansen
Icon for Cirrus rankCirrus
May 06, 2026

I don't see any mention of AS3 in the article but we had issues with missing LTM config in GUI as well.

VM in Azure only had an issue with AS3.

On-prem Velos tenant had issue with both AS3 and missing LTM config

  • Juergen_Mang's avatar
    Juergen_Mang
    Icon for MVP rankMVP
    May 09, 2026

    I hope the engineering hotfix ships before the upcoming security notifications.

    • J-H_Johansen's avatar
      J-H_Johansen
      Icon for Cirrus rankCirrus
      May 10, 2026

      I was hoping 17.5.1.6 would contain more security fixes but I guess we’re in for a treat in the coming weeks/months. I hope they step up the QA process before releasing any other updates related to project glasswing