Oct 14, 2026
Critical Authentication Bypass Flaw in Ivanti Connect Secure Exploited by Hackers
A significant security vulnerability in Ivanti Connect Secure has been exploited by hackers, allowing unauthorized access to systems without requiring legitimate user accounts. This authentication bypass flaw, tracked as CVE-2026-104935, was initially identified by Ivanti as part of their product security program and was patched in the July release 25.1.3.0. However, exploitation occurred before the vendor could backport the fix to all supported versions. The flaw enables attackers to spoof user identity signals, bypassing standard authentication checks entirely, which poses a severe risk for organizations utilizing affected versions of the software.
What changed
The vulnerability has a CVSS score of 8.6 out of 10, indicating a high level of severity. It impacts various product branches, including multiple releases of Ivanti Connect Secure, specifically versions 22.8R2.4 and earlier, along with certain 25.1 releases. Notably, versions 22.7 and earlier are not impacted. In response to the threat, Ivanti has released patches for several versions, including 22.8R2.5 and various 25.1 releases, urging security teams to assess their deployed versions and apply the necessary fixes.
Who is affected
Organizations are advised to investigate potential compromises as they implement the fixes, although reliable indicators of compromise are still being developed. The urgency of this situation is underscored by the fact that attackers were able to execute arbitrary commands on the appliances once they gained access. Security teams are now on high alert, and the incident highlights the critical need for companies to maintain up-to-date security measures and monitor their systems for unusual activities.
What it means
The exploitation of this vulnerability serves as a stark reminder of the importance of swift patch management and the potential consequences of security oversights. As cybersecurity threats continue to evolve, organizations must remain vigilant and proactive in safeguarding their networks against similar vulnerabilities.