CVE-2025-15615 affects the Wazuh Manager authd service in wazuh-manager packages up to version 4.7.3. This vulnerability allows remote attackers to exploit the improper restriction of client-initiated SSL/TLS renegotiation. By sending excessive renegotiation requests, attackers can cause a denial of service, consuming CPU resources and rendering the authd service unavailable.
The CVSS score for this vulnerability is 6.9, categorizing it as medium severity. The risk to organizations includes potential service disruptions and degraded performance. Given the exploitability of this vulnerability, it is crucial for organizations using affected Wazuh versions to prioritize remediation.
Organizations should prioritize patching immediately. There is no known public exploit at this time, but the potential impact underscores the importance of timely updates to mitigate risks associated with this vulnerability.
The vulnerability was published on March 27, 2026, and has been analyzed. The Wazuh team has acknowledged the need for remediation, and organizations are encouraged to review their systems for the affected versions.
Vulnerability Details
Wazuh Manager authd service in wazuh-manager packages through version 4.7.3 contains an improper restriction of client-initiated SSL/TLS renegotiation vulnerability that allows remote attackers to cause a denial of service by sending excessive renegotiation requests. Attackers can exploit the lack of renegotiation limits to consume CPU resources and render the authd service unavailable.
The CVSS score is 6.9, indicating a medium severity level. The attack vector is network-based, with low complexity, requiring no privileges or user interaction for exploitation. The impact on availability is classified as low, but organizations should not underestimate the potential disruptions.
This vulnerability is categorized under CWE-276, indicating improper restriction of operations within the software. It is critical to address this issue by applying patches or updates as soon as possible.
Technical Analysis
The root cause of CVE-2025-15615 is an improper restriction in the handling of SSL/TLS renegotiation requests. Attackers can leverage this flaw by sending a high volume of requests, leading to a denial of service condition.
The attack vector is over the network, requiring low complexity to execute. There are no privileges required, and user interaction is not needed for the successful execution of this attack. The impact on confidentiality and integrity is none, while the availability can be affected due to resource exhaustion.
Risk & Impact Analysis
Risk to organizations includes service disruption and potential denial of service. Given that the vulnerability can be exploited remotely with minimal effort, organizations should assess their exposure and take immediate action.
The urgency to address this vulnerability is medium based on the CVSS score of 6.9. Although it does not result in a complete system compromise, the impact on availability can lead to significant operational challenges.
Organizations should prepare for potential resource consumption attacks and implement monitoring solutions to detect unusual renegotiation patterns.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Wazuh versions prior to 4.8.0 are affected by this vulnerability. Organizations using these versions should take immediate action to upgrade.
Mitigation & Remediation
Organizations should prioritize upgrading to Wazuh version 4.8.0 or later to remediate this vulnerability. If an immediate upgrade is not feasible, consider implementing network controls to limit exposure to unauthorized renegotiation requests.
Regular monitoring and assessment of the authentication service can help detect unusual patterns indicative of exploitation attempts.
Penetration testing can be utilized to validate the effectiveness of remediation efforts post-update.
Detection Guidance
Organizations should monitor logs for indicators of excessive renegotiation attempts and CPU resource utilization spikes. Behavioral anomalies may indicate attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2025-15615 highlights the importance of robust SSL/TLS configurations. As organizations increasingly rely on remote services, understanding vulnerabilities related to secure communications is crucial.
This vulnerability reflects a broader trend in network security where improper configurations can lead to denial of service. Organizations should routinely assess their configurations against best practices.
For comprehensive security, organizations may consider implementing a security assessment to identify and remediate potential vulnerabilities across their infrastructure.
Maintaining an updated knowledge base regarding vulnerabilities like CVE-2025-15615 can enhance an organization's defensive posture.
Engaging with security experts through red teaming services can provide valuable insights into potential attack vectors and enhance overall security strategies.
In conclusion, CVE-2025-15615 serves as a reminder of the ongoing need for vigilance and proactive security measures in a rapidly evolving threat landscape.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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