CVE-2022-33137

Name: CVE-2022-33137
Creator: NVD / NIST
Published: 2022-07-12T10:15:10.707+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2022-33137 is a high-severity vulnerability rated 8/10 on the CVSS scale. A vulnerability has been identified in SIMATIC MV540 H (All versions < V3.3), SIMATIC MV540 S (All versions < V3.3), SIMATIC MV550 H (All versions < V3.3), SIMATIC MV550 S (All versions < V3.3), SIMATIC MV560 U (All versions < V3.3), SIMATIC MV560 X (All versions < V3.3). The web session management of affected devices does not invalidate session ids in certain logout scenarios. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

A vulnerability has been identified in SIMATIC MV540 H (All versions < V3.3), SIMATIC MV540 S (All versions < V3.3), SIMATIC MV550 H (All versions < V3.3), SIMATIC MV550 S (All versions < V3.3), SIMATIC MV560 U (All versions < V3.3), SIMATIC MV560 X (All versions < V3.3). The web session management of affected devices does not invalidate session ids in certain logout scenarios. This could allow an authenticated remote attacker to hijack other users' sessions.

Metrics

CVSS 3.1

8/10

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

EPSS Probability

0.73%

49.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Siemens	Simatic Mv540 H Firmware	< 3.3
Siemens	Simatic Mv540 S Firmware	< 3.3
Siemens	Simatic Mv550 H Firmware	< 3.3
Siemens	Simatic Mv550 S Firmware	< 3.3
Siemens	Simatic Mv560 U Firmware	< 3.3
Siemens	Simatic Mv560 X Firmware	< 3.3

References

https://cert-portal.siemens.com/productcert/pdf/ssa-348662.pdfPatch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-348662.pdfPatch, Vendor Advisory

Timeline

Published: Jul 12, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-33137?

How severe is CVE-2022-33137?

CVE-2022-33137 has a CVSS score of 8/10 (HIGH severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2022-33137?

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-2022-33137?

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

Scan your code now

Source: NVD / NIST