Apache ZooKeeper appears in this cluster with both a legacy CVE (CVE-2019-17571, deserialization, CWE-502) and a 2026 variant, indicating that legacy vulnerability re-emergence is an active risk in environments running unpatched distributed coordination infrastructure. Organizations should block external access to ZooKeeper client port 2181 immediately if not already restricted and verify patch status against both CVEs. The presence of a 2006-era CVE in an active 2026 threat cluster signals that asset inventory hygiene for middleware components warrants immediate review.