Full Report
SINEC NMS is affected by SQL injection vulnerability that could allow an authenticated low privileged attacker to exploit by inserting malicious data and achieve privilege escalation. Siemens has released a new version for SINEC NMS and recommends to update to the latest version.
Analysis Summary
# Vulnerability: SQL Injection in Siemens SINEC NMS
## CVE Details
- **CVE ID:** CVE-2025-40755
- **CVSS Score:** 8.8 (High) - CVSS v3.1 / 8.7 (High) - CVSS v4.0
- **CWE:** CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
## Affected Systems
- **Products:** SINEC Network Management System (NMS)
- **Versions:** All versions prior to V4.0 SP1
- **Configurations:** Systems where the `getTotalAndFilterCounts` endpoint is reachable by authenticated users.
## Vulnerability Description
The application fails to properly sanitize user-supplied input directed to the `getTotalAndFilterCounts` endpoint. This allows an attacker to inject malicious SQL commands into the backend database query. Because the application does not properly neutralize these special elements, the injected commands are executed with the privileges of the application's database user.
## Exploitation
- **Status:** Reported via Trend Micro Zero Day Initiative (ZDI-CAN-26570); no current reports of exploitation in the wild.
- **Complexity:** Low
- **Attack Vector:** Network (The attack can be performed remotely over the network protocol).
- **Prerequisites:** Authenticated access (Low Privileged).
## Impact
- **Confidentiality:** High (Attacker can read sensitive data from the database).
- **Integrity:** High (Attacker can modify or insert malicious data, potentially leading to privilege escalation).
- **Availability:** High (Attacker can delete data or disrupt database services).
## Remediation
### Patches
- **SINEC NMS V4.0 SP1:** Siemens recommends updating to V4.0 SP1 or any subsequent later versions to resolve this flaw.
### Workarounds
- No product-specific workaround is provided. Siemens recommends following general security recommendations to limit exposure.
## Detection
- **Indicators of Compromise:** Monitor web server logs for unusual or malformed queries directed at the `getTotalAndFilterCounts` endpoint, specifically those containing SQL syntax (e.g., `'`, `--`, `UNION`, `SELECT`).
- **Detection methods and tools:** Web Application Firewalls (WAF) can be configured with signatures to detect common SQL injection patterns targeting the affected API.
## References
- **Siemens Security Advisory SSA-318832:** hxxps[://]cert-portal[.]siemens[.]com/productcert/pdf/ssa-318832[.]pdf
- **Siemens Support Portal (Download):** hxxps[://]support[.]industry[.]siemens[.]com/cs/ww/en/view/109995116/
- **Industrial Security Guidelines:** hxxps[://]www[.]siemens[.]com/cert/operational-guidelines-industrial-security