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Cisco Bug: CSCur10570 - Cannot manage ACS with IE following certificate re-generation

Last Modified

Nov 27, 2020

Products (1)

  • Cisco Secure Access Control Server for Windows

Known Affected Releases

5.0(0.1) 5.0(0.21.1) 5.0(0.21.2) 5.0(0.21.3) 5.0(0.21.4) 5.0(0.21.5) 5.0(0.21.9) 5.2(0) 5.2(0.1) 5.2(0.2) 5.2(0.3)

Description (partial)

ACS 5.x self-signed certificate uses 512-bit key by default.  If such a certificate is assigned for management, access with IE is no longer possible.  This is because IE enforces a minimum 1024-bit key length for access to any SSL site (

ACS 5.x with 512-bit key length certificate for management.  Use of IE as browser attempting access.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
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