CVE-2026-20715 in Active Management Technology
Summary
by MITRE • 08/11/2026
Improper input validation in some firmware for some Intel(R) Active Management Technology (Intel(R) AMT) and some Intel(R) Standard Manageability may allow a denial of service. Network adversary with an unauthenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via network access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
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Analysis
by VulDB Data Team • 08/11/2026
This vulnerability resides within the firmware implementations of Intel Active Management Technology and Standard Manageability components, representing a critical weakness in input validation mechanisms that can be exploited to achieve denial of service conditions. The flaw manifests when network adversaries can leverage unauthenticated access combined with low complexity attack vectors to disrupt system operations without requiring any user interaction or specialized internal knowledge. From a technical perspective, this represents an improper input validation issue that falls under CWE-20, which encompasses various forms of input sanitization failures that can lead to system instability and operational disruption.
The operational impact of this vulnerability extends beyond simple service interruption as it specifically targets the availability aspect of the system with high severity implications. While confidentiality and integrity remain unaffected, the availability compromise can render the managed systems inoperable or inaccessible, effectively disabling the remote management capabilities that organizations rely upon for maintenance and monitoring. This creates a cascading effect where network adversaries can exploit the vulnerability through standard network access methods, making it particularly dangerous in environments where remote management is critical for system operations.
The attack surface for this vulnerability encompasses all systems running affected Intel AMT and Standard Manageability firmware versions, with exploitation requiring only basic network connectivity and no authentication credentials. This characteristic places organizations at significant risk as the attack vector is accessible through standard network protocols without the need for privileged access or complex exploitation techniques. The vulnerability's classification aligns with ATT&CK technique T1499 which covers network denial of service attacks, specifically targeting system availability through manipulation of management interfaces.
Mitigation strategies should focus on immediate firmware updates from Intel to address the input validation deficiencies present in affected implementations. Organizations must also implement network segmentation and access controls to limit exposure of management interfaces to trusted networks only, while monitoring for suspicious network activity that could indicate exploitation attempts. Additionally, regular vulnerability assessments should be conducted to identify any remaining systems that may be vulnerable, ensuring comprehensive protection across all managed infrastructure components.
This vulnerability demonstrates the critical importance of robust input validation in firmware implementations, particularly within remote management systems where unauthorized access can have severe operational consequences. The lack of authentication requirements for exploitation makes this issue particularly concerning as it can be leveraged by attackers without prior access to the system, highlighting the need for comprehensive security measures throughout the entire system lifecycle and emphasizing the importance of maintaining current firmware versions to protect against known vulnerabilities.