CVE-2026-38968 Ntop CVE debrief

Who should care

Administrators and users of ntopng versions up to 6.6 should be aware of this vulnerability and take necessary steps to mitigate it. This includes updating to a version greater than 6.6 and implementing additional security measures to protect against session hijacking. Network administrators, security teams, and IT professionals responsible for network monitoring and security should prioritize this vulnerability for remediation.

Technical summary

The vulnerability is caused by the use of weak time-seeded pseudo-randomness during session creation in src/HTTPserver.cpp. This can lead to predictable session identifiers and potentially allow for session hijacking. The vulnerability has a CVSS score of 9.8 and is considered critical. The use of weak randomness in session creation allows attackers to predict and potentially hijack authenticated sessions, which could lead to unauthorized access or malicious actions within the network being monitored by ntopng.

Defensive priority

High

Recommended defensive actions

• Update ntopng to a version greater than 6.6
• Implement additional security measures to protect against session hijacking
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability was reported by an unknown source and is described in the CVE-2026-38968 record. The NVD entry is currently Analyzed. Evidence is limited, and defenders should verify the affected scope and severity with the vendor or other trusted sources. The session identifier predictability could allow attackers to hijack authenticated sessions, potentially leading to unauthorized access or malicious actions within the network being monitored by ntopng.

Official resources