CVE-2026-76427 is a medium severity vulnerability in Cisco ISE's offline profiler feed service. It allows an authenticated remote attacker with administrative credentials to read arbitrary files on the affected device by exploiting XML external entity (XXE) processing. The attacker uploads a crafted offline feed package via the administrative interface, leveraging an XML parser that does not disable external entity resolution. This could also enable the attacker to issue requests to internal systems from the compromised device.