PatchSiren cyber security CVE debrief
CVE-2018-25236 Belden CVE debrief
CVE-2018-25236 is an authentication bypass vulnerability in the HTTP(S) management module of Hirschmann HiOS and HiSecOS products, including RSP, RSPE, RSPS, RSPL, MSP, EES, EESX, GRS, OS, RED, and EAGLE. The vulnerability allows unauthenticated remote attackers to gain administrative access by crafting specially formed HTTP requests, exploiting improper authentication handling to obtain the authentication status and privileges of a previously authenticated user without providing valid credentials.
- Vendor
- Belden
- Product
- Hirschmann HiOS
- CVSS
- CRITICAL 9.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-04-03
- Original CVE updated
- 2026-07-21
- Advisory published
- 2026-04-03
- Advisory updated
- 2026-07-21
Who should care
Organizations using Hirschmann HiOS and HiSecOS products, specifically RSP, RSPE, RSPS, RSPL, MSP, EES, EESX, GRS, OS, RED, and EAGLE, should prioritize patching this vulnerability to prevent potential unauthorized administrative access.
Technical summary
The CVE-2018-25236 vulnerability is a critical authentication bypass issue in the HTTP(S) management module of multiple Hirschmann products. Attackers can exploit this vulnerability by crafting specially formed HTTP requests, allowing them to gain administrative access without valid credentials. This is achieved by exploiting improper authentication handling, which enables attackers to obtain the authentication status and privileges of a previously authenticated user.
Defensive priority
High priority should be given to patching CVE-2018-25236 due to its critical severity and potential for unauthorized administrative access.
Recommended defensive actions
- Apply patches or updates provided by the vendor to address the authentication bypass vulnerability.
- Implement compensating controls, such as restricting access to the HTTP(S) management module.
- Monitor for suspicious activity and implement exception tracking.
- Conduct inventory checks to ensure all affected products are identified and remediated.
- Consider disabling HTTP(S) management module access until patches are applied.
Evidence notes
The CVE record was published on 2026-04-03T23:17:00.823Z and was last modified on 2026-07-21T07:10:00.117Z. The NVD entry is currently Awaiting Analysis. Limited source detail is available, and further verification is required to confirm the scope of affected products and the efficacy of vendor remediation.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-03T23:17:00.823Z and has not been modified since then. The NVD entry is currently Awaiting Analysis.