Improper authorization in Siemens SINEC NMS
Priority LOW 30CWE-285Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-285.
Summary
A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP2 Update 1). An authenticated attacker could change the user profile of any user without proper authorization. With this, the attacker could change the password of any user in the affected system.
Why it matters now
EPSS 0.00619 49th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Siemens | SINEC NMS | All versions < V1.0 SP2 Update 1 | — | No fix listed | CNA |
- SINEC NMS VendorSiemens Affected All versions < V1.0 SP2 Update 1 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:siemens:sinec_nms:*:*:*:*:*:*:*:* | before 1.0 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:sinec_nms:1.0:-:*:*:*:*:*:* | 1.0 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:sinec_nms:1.0:sp1:*:*:*:*:*:* | 1.0 sp1 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:sinec_nms:1.0:sp2:*:*:*:*:*:* | 1.0 sp2 | Vulnerable | Siemens |
- cpe:2.3:a:siemens:sinec_nms:*:*:*:*:*:*:*:* Versions before 1.0 Vulnerable ·Siemens
- cpe:2.3:a:siemens:sinec_nms:1.0:-:*:*:*:*:*:* Versions 1.0 Vulnerable ·Siemens
- cpe:2.3:a:siemens:sinec_nms:1.0:sp1:*:*:*:*:*:* Versions 1.0 sp1 Vulnerable ·Siemens
- cpe:2.3:a:siemens:sinec_nms:1.0:sp2:*:*:*:*:*:* Versions 1.0 sp2 Vulnerable ·Siemens
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-33723
- 2026-10-03 Alias added: GHSA-pmr7-g2c9-7xhw
References
More Siemens Sinec Nms vulnerabilities
- TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2021-16656 ap_escape_quotes buffer overflow CVSS 3.1CRITICAL 9.8
- TI-2021-13795 NULL pointer dereference in httpd core CVSS 3.1HIGH 7.5
- TI-2021-02413 NULL pointer deref in signature_algorithms processing CVSS 3.1MEDIUM 5.9
- TI-2021-13105 SQL injection in Siemens SINEC NMS CVSS 3.1HIGH 7.2
Sources
- CVE-2021-33723 · CVE Program
- CVE-2021-33723 · NVD
- FIRST EPSS
- GHSA-pmr7-g2c9-7xhw · GitHub Advisory Database · CC BY 4.0
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