CVE-2026-11374: Critical ManageEngine SSO Vulnerability Exposes Accounts to Takeover
Executive Summary
In June 2026, a critical vulnerability (CVE-2026-11374) was identified in ManageEngine's ADSelfService Plus, RecoveryManager Plus, M365 Manager Plus, and ADAudit Plus when integrated with AD360. This flaw allowed unauthenticated attackers to predict Single Sign-On (SSO) tickets, leading to potential account takeovers. The vulnerability stemmed from the generation of predictable SSO tickets, enabling attackers to impersonate legitimate users and gain unauthorized access to sensitive systems. ManageEngine promptly addressed the issue by releasing patches for the affected products, enhancing the randomness of SSO ticket generation to prevent exploitation.
This incident underscores the importance of robust authentication mechanisms and the need for organizations to stay vigilant against evolving attack vectors targeting identity and access management systems. The rise in sophisticated authentication bypass techniques highlights the necessity for continuous monitoring and timely application of security patches to safeguard critical infrastructure.
Why This Matters Now
The CVE-2026-11374 vulnerability highlights the critical need for organizations to promptly update their ManageEngine products to prevent potential account takeovers. With attackers increasingly targeting authentication mechanisms, ensuring the implementation of robust and unpredictable SSO ticket generation is essential to maintain system integrity and protect sensitive data.
Attack Path Analysis
An unauthenticated attacker exploited the predictable SSO ticket generation in ManageEngine's AD360-integrated products to gain administrative access. By predicting the millisecond timestamp used as the SSO ticket, the attacker replayed the ticket to assume the victim's session. Once authenticated, the attacker could escalate privileges, move laterally within the network, establish command and control channels, exfiltrate sensitive data, and potentially disrupt services.
Kill Chain Progression
Initial Compromise
Description
The attacker exploited the predictable SSO ticket generation by guessing the millisecond timestamp used as the ticket, allowing unauthorized access.
Related CVEs
CVE-2026-11374
CVSS 9In ManageEngine ADSelfService Plus, RecoveryManager Plus, M365 Manager Plus, and ADAudit Plus, the SSO tickets generated to authenticate sessions could be predicted by an unauthenticated user, leading to account takeover.
Affected Products:
ManageEngine ADSelfService Plus – 6528 and earlier
ManageEngine RecoveryManager Plus – 6320 and earlier
ManageEngine M365 Manager Plus – 4816 and earlier
ManageEngine ADAudit Plus – 8702 and earlier
Exploit Status:
no public exploit
MITRE ATT&CK® Techniques
Modify Authentication Process
Domain Controller Authentication
Network Device Authentication
Multi-Factor Authentication
Multi-Factor Authentication Interception
Potential Compliance Exposure
Mapping incident impact across multiple compliance frameworks.
PCI DSS 4.0 – Strong Authentication for Users
Control ID: 8.3.1
NYDFS 23 NYCRR 500 – Multi-Factor Authentication
Control ID: 500.12
DORA – ICT Risk Management Framework
Control ID: Article 6
CISA ZTMM 2.0 – Identity Verification and Authentication
Control ID: Identity Pillar
NIS2 Directive – Cybersecurity Risk Management Measures
Control ID: Article 21
Sector Implications
Industry-specific impact of the vulnerabilities, including operational, regulatory, and cloud security risks.
Information Technology/IT
Critical authentication bypass in ManageEngine AD management platforms exposes IT infrastructure to unauthenticated admin takeover, compromising network segmentation and encrypted traffic controls.
Financial Services
CVE-2026-11374 threatens HIPAA/PCI compliance requirements for encrypted traffic and zero trust segmentation, enabling lateral movement across financial network infrastructures.
Health Care / Life Sciences
Authentication bypass vulnerability violates HIPAA 164.312 encrypted traffic requirements, exposing patient data through compromised east-west traffic security and policy enforcement failures.
Government Administration
ManageEngine Active Directory compromise enables privilege escalation in government networks, bypassing NIST 800-53 compliance controls for multicloud visibility and threat detection.
Sources
- A Millisecond of Predictability: Why CVE-2026-11374 Is Hard to Exploithttps://bishopfox.com/blog/millisecond-of-predictability-why-cve-2026-11374-hard-to-exploitVerified
- NVD - CVE-2026-11374https://nvd.nist.gov/vuln/detail/CVE-2026-11374Verified
- CVE-2026-11374: Account takeover vulnerability in ADSelfService Plus, RecoveryManager Plus, M365 Manager Plus, and ADAudit Plushttps://www.manageengine.com/products/self-service-password/advisory/CVE-2026-11374.htmlVerified
Frequently Asked Questions
Cloud Native Security Fabric Mitigations and ControlsCNSF
Aviatrix Zero Trust CNSF is pertinent to this incident as it would likely limit the attacker's ability to move laterally and exfiltrate data by enforcing strict segmentation and identity-aware policies.
Control: Cloud Native Security Fabric (CNSF)
Mitigation: While Aviatrix CNSF may not prevent the initial unauthorized access due to application-level vulnerabilities, it would likely limit the attacker's ability to exploit this access to move laterally or escalate privileges.
Control: Zero Trust Segmentation
Mitigation: Aviatrix Zero Trust Segmentation would likely limit the attacker's ability to escalate privileges by enforcing strict identity-based access controls, reducing the scope of accessible resources.
Control: East-West Traffic Security
Mitigation: Aviatrix East-West Traffic Security would likely limit the attacker's lateral movement by enforcing strict segmentation and monitoring, reducing the reachability of other systems.
Control: Multicloud Visibility & Control
Mitigation: Aviatrix Multicloud Visibility & Control would likely limit the establishment of command and control channels by monitoring and controlling outbound communications, reducing unauthorized external connections.
Control: Egress Security & Policy Enforcement
Mitigation: Aviatrix Egress Security & Policy Enforcement would likely limit data exfiltration by enforcing strict egress policies and monitoring, reducing unauthorized data transfers.
Aviatrix CNSF would likely reduce the overall impact of such attacks by limiting the attacker's ability to move laterally and access critical systems, thereby reducing the blast radius.
Impact at a Glance
Affected Business Functions
- User Authentication
- Access Management
Estimated downtime: N/A
Estimated loss: N/A
Potential unauthorized access to user accounts and sensitive data.
Recommended Actions
Key Takeaways & Next Steps
- • Implement Zero Trust Segmentation to enforce least privilege access and limit lateral movement.
- • Deploy East-West Traffic Security to monitor and control internal traffic, detecting unauthorized movements.
- • Utilize Multicloud Visibility & Control to gain comprehensive insights into network activities across cloud environments.
- • Apply Egress Security & Policy Enforcement to restrict unauthorized data exfiltration and outbound communications.
- • Integrate Threat Detection & Anomaly Response systems to identify and respond to suspicious activities promptly.
