CVE-2025-2566
Deserialization of Untrusted Data in Kaleris Navis N4
02 Description
Deserialization of Untrusted Data in Kaleris Navis N4
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.64% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 50.3% of scored records. A rank, not a probability.
- NVD base score
- 9.3 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Deferred. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2025-06-24 18:27Z1 YR AGO
- Last updated
- 2025-06-24 18:47Z1 YR AGO
- Reserved
- 2025-03-20
- Assigning CNA
- icscert
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.3)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Weaknesses
- CWE-502Deserialization of Untrusted DataBase
- Data version
- 5.1
- Document digest
- 1f21f312cef4726f43e09da3c625fd86b9c58725aa5b8280ca8fb68dc83bfd3b
05 Affected products
06 References
07 Remediation
Kaleris recommends users to implement the following versions or later: * Navis N4: Version 3.1.44+ * Navis N4: Version 3.2.26+ * Navis N4: Version 3.3.27+ * Navis N4: Version 3.4.25+ * Navis N4: Version 3.5.18+ * Navis N4: Version 3.6.14+ * Navis N4: Version 3.7.0+ * Navis N4: Version 3.8.0+ If users are unable to update, Kaleris recommends following these mitigations: * If N4 does not need to be exposed to the internet, placing it behind a firewall. * If CAP needs to be exposed to the internet, disable the Ultra Light Client on the nodes being exposed. This can be done by blocking the Ultra Light Client URLs in the load balancer or firewall by blocking the following patterns: "url-pattern*.jnlp</url-pattern" and "url-pattern/ulc</url-pattern" * The Ultra Light Client endpoint can also be disabled on the N4 Cluster node by commenting out relevant code in the web.xml file and restarting the server. * If the Ultra Light Client must be exposed to the Internet, do one of the following: a. Set up a secure VPN connection to allow access for known external parties. b. Set up an authenticated jump system (Citrix, VDI, Etc.). c. Whitelist external allowed IPs. (least secure option) * Additionally, the following controls should be applied: a. Restrict the number of N4 nodes exposed to the internet. b. Ensure that HTTPS is enabled and configured on the filewall/loadbalancer. c. Use a reliable third-party party firewall with built in DDOS protection that can detect unwanted