A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP1 Update 1), SINEMA Server (All versions < V14.0 SP2 Update 2).

published 2021-02-09 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-17927

cvss: 8.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 20.6%; EPSS 20.6% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known

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)

Patch / fix

fixed in 2

siemens sinec_network_management_system 1.0
siemens sinema_server 14.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-040-03 updated 2021-02-09 cvss 8.8

Siemens SINEMA Server & SINEC NMS

Siemens SINEC NMS <V1.0_SP1_Update_1
affected: fixed in V1.0, mitigation
Siemens SINEMA Server <V14.0_SP2_Update_2
affected: fixed in V14.0, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

20.62% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
NVD	2.0	5.5	AV:N/AC:L/Au:S/C:N/I:P/A:P

Affected products

Siemens SINEC NMS
Siemens SINEMA Server

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

cert-portal.siemens.com /productcert/pdf/ssa-156833.pdf
vendor-advisory
us-cert.cisa.gov /ics/advisories/icsa-21-040-03
third-party-advisory, us-government-resource
zerodayinitiative.com /advisories/ZDI-21-253/
third-party-advisory, vdb-entry

Sources

CVE List CVE-2020-25237
NVD CVE-2020-25237

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Summary