ntopng through 6.6 is vulnerable to Predictable Session Identifier which can lead to Session Hijacking. HTTP session identifiers in src/HTTPserver.cpp use weak time-seeded pseudo-randomness during session creation. As a result, fresh authenticated logins can receive deterministic or colliding session cookies under attacker-controlled timing.

• azl3 ntopng 5.2.1-6 on Azure Linux 3.0

• azl3 ntopng 5.2.1-7 on Azure Linux 3.0

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

1. Oct 25, 2026 at 8:40 AM UTC
   • The vendor changed the advisory's last-updated date.
2. Oct 17, 2026 at 12:05 PM UTC
   • Added fixed versions: 5.2.1-7.
3. Sep 28, 2026 at 11:20 AM UTC
   • Added affected products: azl3 ntopng 5.2.1-7 on Azure Linux 3.0.
   • The vendor changed its remediation guidance.

1. Jul 9, 2026 at 1:02 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Sep 3, 2026 at 11:40 PM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

3. Oct 23, 2026 at 1:44 AM UTC
   Updated by Microsoft Security Response Center

   The vendor changed the advisory after it was first published.

4. Oct 28, 2026 at 3:45 AM UTC
   Confirmed at the source

   Our collector saw this advisory during a later source check.