Ivanti Connect Secure Generation of Predictable Numbers or Identifiers Vulnerability
Ivanti — Connect Secure
- Added to KEV catalog
- 30 October 2026
- Federal remediation due date
- 13 November 2026
- Weakness classification (CWE)
- CWE-340
AI Breakdown
What it is
Ivanti Connect Secure contains a vulnerability where predictable numbers or identifiers are generated by the system. This allows a remote authenticated attacker to upload custom files directly to a known location on disk. Attackers can also chain this vulnerability with CVE-2026-104935 and CVE-2026-111357 to deepen their access.
Why it matters
This flaw is actively exploited in the wild and has been cataloged by CISA, making remediation urgent. Although known use in ransomware campaigns is currently unknown, unauthorized file uploads pose a severe threat to network integrity. Chaining this issue with other vulnerabilities enables adversaries to compromise critical gateway infrastructure.
Recommended action
IT teams should immediately apply mitigations according to Ivanti's instructions while adhering to CISA BOD 26-04 guidance and forensics triage requirements. Organizations should evaluate the internet exposure of all affected assets and apply applicable cloud guidance. If mitigations cannot be applied, you must discontinue use of the affected product immediately.
AI-generated from CISA and NVD data — treat as a starting point, not a substitute for your own risk assessment.
CISA Description
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.
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Notes
https://hub.ivanti.com/s/article/Security-Advisory-Ivanti-Connect-Secure-CVE-2026-104935?language=en_US ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-118527
More Ivanti Vulnerabilities
Ivanti Connect Secure Missing Authentication for Critical Function Vulnerability
Ivanti Connect Secure Authentication Bypass by Spoofing Vulnerability
Ivanti Sentry OS Command Injection Vulnerability
Ivanti Endpoint Manager Mobile (EPMM) Improper Input Validation Vulnerability
Ivanti Endpoint Manager Mobile (EPMM) Code Injection Vulnerability
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