CVE-2013-5531: Cisco Identity Services Engine (ISE) 1.x before 1.1.1 allows remote attackers to bypass authentication, and...

Security readout for executives and security teams

CVE-2013-5531 is an authentication bypass in Cisco Identity Services Engine 1.x before 1.1.1. A remote attacker reaching TCP port 443 could use a crafted session to read support-bundle configuration and credential data. That can expose sensitive network access-control information and secrets. Exposure is most likely where Cisco ISE 1.x before 1.1.1 is still deployed and reachable on TCP 443. Internet exposure would increase urgency, but the supplied sources do not state typical deployment exposure or scanning evidence. Treat as high priority for legacy Cisco ISE environments because it combines remote authentication bypass with possible credential disclosure. If no ISE 1.x systems remain, business urgency is low after inventory confirmation. Mitigation focus: Upgrade Cisco ISE 1.x deployments below 1.1.1 to a vendor-supported fixed release.; Review Cisco advisory cisco-sa-20131023-ise for supported remediation details.; Restrict TCP 443 access to Cisco ISE management surfaces where operationally possible..

Prepared

Jun 14, 2026, 15:32 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.