CVE-2022-33138

mediumpriority · track · 30OT risk · elevatedEPSS 0.013 · 71 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.35% (71st) EPSS

CVSS 5 · medium

Is it mine?

30 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

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). Affected devices do not perform authentication for several web API endpoints. This could allow an unauthenticated remote attacker to read and download data from the device.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSIMATIC MV540 Hsiemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV540 Ssiemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV550 Hsiemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV550 Ssiemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV560 Usiemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV560 Xsiemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV540 Hcisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV540 Scisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV550 Hcisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV550 Scisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV560 Ucisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/
FixedSIMATIC MV560 Xcisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109811878/

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:Csecondary · CISA US

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USprimaryCWE-306USCWE-306US

affected products (30)

Products and version ranges known to be affected.

SIMATIC MV540 Hall versionscisa_csaf_otUS
SIMATIC MV540 Sall versionscisa_csaf_otUS
SIMATIC MV550 Hall versionscisa_csaf_otUS
SIMATIC MV550 Sall versionscisa_csaf_otUS
SIMATIC MV560 Uall versionscisa_csaf_otUS
SIMATIC MV560 Xall versionscisa_csaf_otUS
Siemens SIMATIC MV540 H< V3.3cisa_csaf_otUS
Siemens SIMATIC MV540 S< V3.3cisa_csaf_otUS
Siemens SIMATIC MV550 H< V3.3cisa_csaf_otUS
Siemens SIMATIC MV550 S< V3.3cisa_csaf_otUS
Siemens SIMATIC MV560 U< V3.3cisa_csaf_otUS
Siemens SIMATIC MV560 X< V3.3cisa_csaf_otUS
Siemens SIMATIC MV540 HAll versions → V3.3enisa_euvdEU
Siemens SIMATIC MV540 SAll versions → V3.3enisa_euvdEU
Siemens SIMATIC MV550 HAll versions → V3.3enisa_euvdEU
Siemens SIMATIC MV550 SAll versions → V3.3enisa_euvdEU
Siemens SIMATIC MV560 UAll versions → V3.3enisa_euvdEU
Siemens SIMATIC MV560 XAll versions → V3.3enisa_euvdEU
siemens simatic mv540 h firmware< 3.3nvdUScpe:2.3:o:siemens:simatic_mv540_h_firmware:*:*:*:*:*:*:*:*
siemens simatic mv540 s firmware< 3.3nvdUScpe:2.3:o:siemens:simatic_mv540_s_firmware:*:*:*:*:*:*:*:*

showing 20 of 30

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-348662SSA-348662: Multiple Vulnerabilities in SIMATIC MV500 Devices before V3.32022-07-12csaf · siemens_psirtDE
SIMATIC MV500 devices before V3.3 are affected by multiple vulnerabilities that could allow attackers to hijack other users' web based management sessions (CVE-2022-33137) or access data on the device without prior authentication (CVE-2022-33138). Siemens has released an update for the SIMATIC MV500 devices and recommends to update to the latest version. Note that the update also contains additional fixes for vulnerabilities documented in Siemens Security Advisory SSA-712929.
ICSA-22-195-03Siemens SIMATIC MV500 Devices2022-07-12icsa · cisa_csaf_otUS
SIMATIC MV500 devices before V3.3 are affected by multiple vulnerabilities that could allow attackers to hijack other users' web based management sessions (CVE-2022-33137) or access data on the device without prior authentication (CVE-2022-33138). Siemens has released an update for the SIMATIC MV500 devices and recommends to update to the latest version. Note that the update also contains additional fixes for vulnerabilities documented in Siemens Security Advisory SSA-712929.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

published 2022-07-12modified 2026-06-17

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references (7)

External citations — patches, advisories, analysis.

scry

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