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HPE Telco Service Activator Vulnerability Allows Attackers to Bypass Access Controls

Hewlett Packard Enterprise (HPE) has released a security bulletin detailing a critical vulnerability in its Telco Service Activator product. This vulnerability, identified as CVE-2025-12543, has a CVSS base score of 9.6 and affects versions prior to…

ABy Anthony ReidFeb 23, 20261 min read

Hewlett Packard Enterprise (HPE) has released a security bulletin detailing a critical vulnerability in its Telco Service Activator product. This vulnerability, identified as CVE-2025-12543, has a CVSS base score of 9.6 and affects versions prior to 10.5.0.

The vulnerability arises from improper input validation, which could enable attackers to manipulate the server's handling of HTTP requests. This manipulation may lead to unauthorized access, exposure of sensitive data, or partial system compromise. The issue is linked to the Undertow HTTP server core, which fails to properly validate the Host header in incoming HTTP requests.

The vulnerability impacts HPE Telco Service Activator deployments, which are used by telecommunications providers for automating service provisioning across complex network systems.

CVE ID CVSS Score Description Affected Versions Patched Version

Hewlett Packard Enterprise (HPE) has released a security bulletin detailing a critical vulnerability in its Telco Service Activator product.
Anthony Reid · Thehackingpost

CVE-2025-12543 9.6 (Critical) Improper Host Header Validation in Undertow HTTP Core, leading to access restriction bypass HPE Telco Service Activator < 10.5.0 10.5.0

Exploitation of this vulnerability could have serious operational and security implications for network operators, as it allows for remote access restriction bypass. An attacker could craft malicious HTTP requests to circumvent server access controls without requiring prior authorization. The attack vector is classified as Network (AV: N) with low attack complexity (AC:L) and requires no privileges (PR:N), though user interaction is necessary (UI:R).

HPE has addressed this vulnerability in Telco Service Activator version 10.5.0. It is recommended that users of earlier versions upgrade immediately to mitigate this risk. Organizations should also ensure that they apply third-party security patches and updates according to their standard patch management policies.

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Administrators are advised to review the network exposure of HPE Telco Service Activator, restrict access to management interfaces, and apply the latest updates available from HPE’s official support portal.

Based on reporting by GBHackers.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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