CVE-2025-2566: Kaleris Navis n4

Critical severity, CVSS 9.3. EPSS: 0.6% chance of exploitation in the next 30 days.

Kaleris NAVIS N4 ULC (Ultra Light Client) contains an unsafe Java deserialization vulnerability. An unauthenticated attacker can make specially crafted requests to execute arbitrary code on the server.

Affected products

• Kaleris Navis n4: before 4.0 (fixed in 4.0)

Published 2025-06-24. Last modified 2026-06-17.