Ivanti Connect Secure Generation of Predictable Numbers or Identifiers Vulnerability

🚨SEVERITY: UNKNOWNSecurity Advisory

TL;DR 📌

  • Ivanti Connect Secure contains a generation of predictable numbers or identifiers vulnerability that allows a remote authenticated attacker to upload files with attacker-controlled content to a known location on disk. This vulnerability can be chained with CVE-2026-104935 and CVE-2026-111357.
  • Listed in CISA KEV (2026-10-30) — this is being exploited in the wild.
  • Check the advisory for fixed releases — remediation detail is in the vendor link below.
  • CVEs: CVE-2026-118527.

What it is

Ivanti Connect Secure contains a generation of predictable numbers or identifiers vulnerability that allows a remote authenticated attacker to upload files with attacker-controlled content to a known location on disk. This vulnerability can be chained with CVE-2026-104935 and CVE-2026-111357.

For leadership 🧭

Executive summary. Risk is Unknown across any Ivanti kit you run. Follow the remediation in the vendor advisory within Immediate — CISA KEV entries carry a federal remediation deadline.

Why it matters:

  • Exposure depends on deployment topology and which access paths reach the affected component.
  • Treat internet-facing and management-plane instances as higher risk than internal-only ones.
  • Keep monitoring for abnormal authentication and configuration events until upgrades complete.

Now / Next / Later:

  • Now: confirm whether you run the affected versions, and check exposure of any that are internet-facing.
  • Next: apply the remediation the advisory specifies, through an approved change window.
  • Later: add a control check so builds cannot drift back onto a vulnerable train.

Source