CVE-2021-42021

Name: CVE-2021-42021
Creator: NVD / NIST
Published: 2021-11-09T12:15:10.523+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.69%

Last modified Jun 17, 2026

CVE-2021-42021 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability has been identified in Siveillance Video DLNA Server (2019 R1), Siveillance Video DLNA Server (2019 R2), Siveillance Video DLNA Server (2019 R3), Siveillance Video DLNA Server (2020 R1), Siveillance Video DLNA Server (2020 R2), Siveillance Video DLNA Server (2020 R3), Siveillance Video DLNA Server (2021 R1). The affected application contains a path traversal vulnerability that could allow to read arbitrary files on the server that are outside the application’s web document directory. EPSS estimates a 1.69% chance of exploitation in the next 30 days.

Description

A vulnerability has been identified in Siveillance Video DLNA Server (2019 R1), Siveillance Video DLNA Server (2019 R2), Siveillance Video DLNA Server (2019 R3), Siveillance Video DLNA Server (2020 R1), Siveillance Video DLNA Server (2020 R2), Siveillance Video DLNA Server (2020 R3), Siveillance Video DLNA Server (2021 R1). The affected application contains a path traversal vulnerability that could allow to read arbitrary files on the server that are outside the application’s web document directory. An unauthenticated remote attacker could exploit this issue to access sensitive information for subsequent attacks.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.69%

74.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Siemens	Siveillance Video Management Software 2019 R1	All versions
Siemens	Siveillance Video Management Software 2019 R2	All versions
Siemens	Siveillance Video Management Software 2019 R3	All versions
Siemens	Siveillance Video Management Software 2020 R1	All versions
Siemens	Siveillance Video Management Software 2020 R2	All versions

References

https://cert-portal.siemens.com/productcert/pdf/ssa-755517.pdfPatch, Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-755517.pdfPatch, Third Party Advisory

Timeline

Published: Nov 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42021?

How severe is CVE-2021-42021?

CVE-2021-42021 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.69% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42021?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-42021?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST