CVE-2021-40366

Name: CVE-2021-40366
Creator: NVD / NIST
Published: 2021-11-09T12:15:10.123+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2021-40366 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A vulnerability has been identified in Climatix POL909 (AWB module) (All versions < V11.42), Climatix POL909 (AWM module) (All versions < V11.34). The web server of affected devices transmits data without TLS encryption. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

A vulnerability has been identified in Climatix POL909 (AWB module) (All versions < V11.42), Climatix POL909 (AWM module) (All versions < V11.34). The web server of affected devices transmits data without TLS encryption. This could allow an unauthenticated remote attacker in a man-in-the-middle position to read sensitive data, such as administrator credentials, or modify data in transit.

Metrics

CVSS 3.1

7.4/10

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

EPSS Probability

0.41%

32.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Siemens	Climatix Pol909 Firmware	< 11.34
Siemens	Climatix Pol909 Firmware	< 11.42

References

https://cert-portal.siemens.com/productcert/pdf/ssa-703715.pdfVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-703715.pdfVendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-40366?

How severe is CVE-2021-40366?

CVE-2021-40366 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40366?

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-2021-40366?

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

Scan your code now

Source: NVD / NIST