Deserialization of untrusted data in Siemens SINEC NMS
Priority LOW 35CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-502.
Summary
A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP2 Update 1). The affected system allows to upload JSON objects that are deserialized to JAVA objects. Due to insecure deserialization of user-supplied content by the affected software, a privileged attacker could exploit this vulnerability by sending a crafted serialized Java object. An exploit could allow the attacker to execute arbitrary code on the device with root privileges.
Why it matters now
EPSS 0.01551 75th 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-2021-33728
- 2026-10-03 Alias added: GHSA-6ccq-w7mc-g74j
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-2021-33728 · CVE Program
- CVE-2021-33728 · NVD
- FIRST EPSS
- GHSA-6ccq-w7mc-g74j · GitHub Advisory Database · CC BY 4.0
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