What’s Vulnerable › Vulnerabilities

CVE-2020-25237

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 20.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-09 · updated 2026-06-17
• Weakness: CWE-22

Description

A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP1 Update 1), SINEMA Server (All versions < V14.0 SP2 Update 2). When uploading files to an affected system using a zip container, the system does not correctly check if the relative file path of the extracted files is still within the intended target directory. With this an attacker could create or overwrite arbitrary files on an affected system. This type of vulnerability is also known as 'Zip-Slip'. (ZDI-CAN-12054)

Affected products

• Siemens Sinec Network Management System: before 1.0; 1.0, 1.0-sp1 — fixed in 1.0
• Siemens SINEMA Server V14: before 14.0; 14.0, 14.0-sp1, 14.0-sp2, 14.0-sp2_update1 — fixed in 14.0

How to fix

Upgrade to a fixed version: Siemens Sinec Network Management System 1.0; Siemens SINEMA Server V14 14.0. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-156833.pdf
• https://us-cert.cisa.gov/ics/advisories/icsa-21-040-03
• https://www.zerodayinitiative.com/advisories/ZDI-21-253/
• https://cert-portal.siemens.com/productcert/pdf/ssa-156833.pdf
• https://us-cert.cisa.gov/ics/advisories/icsa-21-040-03
• https://www.zerodayinitiative.com/advisories/ZDI-21-253/

Get alerted when CVE-2020-25237 or the next vulnerability affects your stack