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CVE-2025-20282: Critical Vulnerability in Cisco Identity Services Engine

A critical vulnerability in Cisco Identity Services Engine could allow unauthenticated attackers to execute arbitrary files on affected systems. Organizations must patch immediately to mitigate risks.

CRITICALPublic ExploitCVSS 10 · Published June 25, 2025

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CVE-2025-20282 is a critical vulnerability affecting Cisco's Identity Services Engine (ISE) and its Passive Identity Connector (ISE-PIC). This vulnerability allows an unauthenticated, remote attacker to upload arbitrary files to an affected device and execute those files on the underlying operating system as root. The severity of this vulnerability is underscored by its CVSS score of 10, indicating a critical risk level that organizations must prioritize.

The vulnerability arises from a lack of file validation checks, enabling attackers to place malicious files in privileged directories. If successfully exploited, attackers can execute arbitrary code, potentially gaining root privileges on the system. Given the significant impact of this vulnerability, organizations should prioritize patching immediately.

Currently, there is known exploit availability, which increases the urgency for organizations to address this vulnerability as part of their security posture. Continuous monitoring and timely patching are imperative to safeguard against potential exploits.

Risk to organizations includes potential unauthorized access, data breaches, and significant operational disruptions that could arise from successful exploitation of this vulnerability. It is crucial for security teams to evaluate their systems and implement necessary updates.

Vulnerability Details

The vulnerability is classified as a critical issue due to its potential impact on system integrity and confidentiality. The specific attack vector is network-based, with low complexity required for exploitation, as no privileges or user interaction are necessary. The affected components include the Cisco Identity Services Engine and the Passive Identity Connector, specifically version 3.4.0 and its patches.

The vulnerability is officially documented under CWE-269, which refers to improper privilege management. Its CVSS score of 10 reflects its critical nature, indicating severe implications for organizations that fail to apply remediation measures.

Technical Analysis

The root cause of this vulnerability is the lack of file validation checks in the affected internal API of Cisco's ISE. Attackers can exploit this weakness by uploading crafted files to the system. The attack vector is network-based, allowing remote exploitation without the need for physical access to the system.

The attack complexity is considered low, as no privileges are required for an attacker to exploit the vulnerability. Furthermore, user interaction is not required, making this vulnerability particularly dangerous. The impact on confidentiality, integrity, and availability is rated high, indicating that an exploit could lead to significant data loss and system compromise.

Risk & Impact Analysis

The real-world risk associated with CVE-2025-20282 is substantial. Organizations utilizing Cisco's Identity Services Engine and its Passive Identity Connector are at heightened risk of unauthorized access and potential data breaches. The blast radius of this vulnerability extends to any connected systems, as attackers could leverage access to move laterally within an organization’s network.

The urgency for organizations to respond to this vulnerability is underscored by its critical classification and known exploit availability. Organizations should assess their exposure and prioritize remediation strategies to mitigate potential impacts effectively.

Exploitation Status

Signal

Status

Known Exploit

Yes

Public PoC

Yes

Actively Exploited

No

Ransomware Use

No

Affected Versions

The Cisco Identity Services Engine and its Passive Identity Connector versions 3.4.0 and its patches are affected by this vulnerability. Organizations should consider all versions prior to the vendor patch as vulnerable.

Mitigation & Remediation

Organizations should prioritize patching their systems immediately to mitigate the risks associated with this vulnerability. The recommended action is to upgrade to the latest patched version of Cisco Identity Services Engine and Passive Identity Connector.

In cases where immediate patching is not feasible, organizations should implement additional layers of security, such as network segmentation and monitoring, to detect any unauthorized access attempts. Configuration hardening and regular audits can also help reduce exposure to this critical vulnerability.

penetration testing can also assist in identifying and remediating vulnerabilities effectively.

Detection Guidance

To detect potential exploitation of CVE-2025-20282, organizations should monitor logs for unauthorized file uploads and execution attempts. Behavioral anomalies, such as unexpected system changes or unauthorized access patterns, should also be scrutinized.

Network signatures can be established to alert on suspicious activity related to file uploads, and systems should be configured to restrict access to sensitive directories to mitigate risks.

AppSecure Threat Intelligence Insight

The implications of CVE-2025-20282 highlight the necessity for organizations to continuously evaluate their security mechanisms and remain vigilant against evolving threats. This vulnerability is a stark reminder of the critical importance of file validation checks in preventing unauthorized access and exploitation.

Security teams should take this incident as a cue to enhance their security protocols and ensure that adequate measures are in place to protect against similar vulnerabilities in the future. Engaging in regular security assessments and adopting a proactive security posture can significantly mitigate risks.

Understanding penetration testing methodology can be beneficial in fortifying defenses and ensuring compliance with security best practices.

Designing an effective vulnerability management program is essential for organizations to systematically address vulnerabilities as they arise and maintain a secure environment.

Cloud penetration testing strategies can also help organizations evaluate their security measures in cloud environments.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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