Plattform
siemens
Komponente
siemens-sinec-nms
Behoben in
4.0 SP3
CVE-2026-24032 details an authentication bypass vulnerability discovered in SINEC NMS, specifically affecting versions prior to V4.0 SP3 with the UMC component. The flaw stems from insufficient validation of user identity during the authentication process. This allows an unauthenticated remote attacker to bypass authentication and potentially gain unauthorized access to the application, compromising the integrity and confidentiality of the network management system.
Successful exploitation of CVE-2026-24032 allows an attacker to bypass the authentication mechanism and access the SINEC NMS application without valid credentials. This unauthorized access could grant the attacker the ability to view sensitive network configuration data, modify network settings, and potentially disrupt network operations. The impact is significant, as it could compromise the entire network infrastructure managed by SINEC NMS. The vulnerability's severity is heightened by the fact that it can be exploited remotely without requiring any prior authentication.
CVE-2026-24032 was published on 2026-04-14. The exploitation probability is considered medium, as it requires knowledge of the authentication bypass technique. There are currently no publicly known Proof-of-Concept (POC) exploits. The vulnerability is not listed on KEV or EPSS as of this writing. Refer to the NVD and CISA advisories for updates. The vulnerability was reported to ZDI (ZDI-CAN-27564).
Organizations utilizing SINEC NMS in industrial control system (ICS) environments are particularly at risk. This includes manufacturing plants, power grids, and other critical infrastructure sectors. Legacy deployments running older versions of SINEC NMS, especially those with direct internet exposure, face the highest level of threat.
• linux / server:
journalctl -u sinec_nms -g "authentication failure"• linux / server:
ps aux | grep -i umc• generic web: Use a web proxy or network analyzer to monitor traffic to the UMC interface (typically port 80 or 443) for unauthorized access attempts.
disclosure
Exploit-Status
EPSS
0.04% (11% Perzentil)
CISA SSVC
CVSS-Vektor
The primary mitigation for CVE-2026-24032 is to upgrade SINEC NMS to version V4.0 SP3 or later, which includes the necessary fix for the authentication bypass vulnerability. If an immediate upgrade is not possible, implement strict network segmentation to limit access to the SINEC NMS application. Review and strengthen authentication policies, ensuring that all users are properly authenticated before being granted access. Monitor network traffic for suspicious activity and implement intrusion detection systems (IDS) to detect and respond to potential attacks. After upgrading, verify the fix by attempting to access the application without valid credentials and confirming that authentication is enforced.
Actualice SINEC NMS a la versión 4.0 SP3 o superior para mitigar la vulnerabilidad de autenticación. Consulte la nota de seguridad SSA-801704 en el portal de certificación de Siemens para obtener más detalles e instrucciones de mitigación.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2026-24032 is a HIGH severity vulnerability in SINEC NMS versions 0.0.0–V4.0 SP3 with UMC, allowing unauthenticated attackers to bypass authentication and gain unauthorized access.
You are affected if you are running SINEC NMS versions 0.0.0 through V4.0 SP3 that utilize the UMC component. Upgrade to V4.0 SP3 to mitigate the risk.
Upgrade SINEC NMS to version V4.0 SP3 or later. As a temporary workaround, restrict access to the UMC component and implement network segmentation.
While no active exploitation has been publicly confirmed, the ease of exploitation makes it a high-priority vulnerability and potential target.
Refer to the official SINEC NMS security advisories on the Siemens website for detailed information and updates regarding CVE-2026-24032.
Lade deine Abhängigkeitsdatei hoch und erfahre sofort, ob dich diese und andere CVEs treffen.