CVE-2021-40368

mediumpriority · track · 20EPSS 0.010 · 63 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.00% (63rd) EPSS
CVSS 5 · medium
Is it mine?
88 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-23

A vulnerability has been identified in SIMATIC S7-400 CPU 412-1 DP V7 (All versions), SIMATIC S7-400 CPU 412-2 DP V7 (All versions), SIMATIC S7-400 CPU 412-2 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 414-2 DP V7 (All versions), SIMATIC S7-400 CPU 414-3 DP V7 (All versions), SIMATIC S7-400 CPU 414-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 414F-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 416-2 DP V7 (All versions), SIMATIC S7-400 CPU 416-3 DP V7 (All versions), SIMATIC S7-400 CPU 416-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 416F-2 DP V7 (All versions), SIMATIC S7-400 CPU 416F-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 417-4 DP V7 (All versions), SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants) (All versions < V6.0.10), SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants) (All versions < V10.1), SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants) (All versions < V8.2.3), SIPLUS S7-400 CPU 414-3 PN/DP V7 (All versions < V7.0.3), SIPLUS S7-400 CPU 416-3 PN/DP V7 (All versions < V7.0.3), SIPLUS S7-400 CPU 416-3 V7 (All versions), SIPLUS S7-400 CPU 417-4 V7 (All versions). Affected devices improperly handle specially crafted packets sent to port 102/tcp. This could allow an attacker to create a Denial-of-Service condition. A restart is needed to restore normal operations.

01

remediations

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

A vendor fix is available.

  • Fixed SIMATIC S7-400 CPU 412-2 PN/DP V7 (6ES7412-2EK07-0AB0)siemens_psirt

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • Fixed SIMATIC S7-400 CPU 414-3 PN/DP V7 (6ES7414-3EM07-0AB0)siemens_psirt

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • Fixed SIMATIC S7-400 CPU 414F-3 PN/DP V7 (6ES7414-3FM07-0AB0)siemens_psirt

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • Fixed SIMATIC S7-400 CPU 416-3 PN/DP V7 (6ES7416-3ES07-0AB0)siemens_psirt

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • Fixed SIMATIC S7-400 CPU 416F-3 PN/DP V7 (6ES7416-3FS07-0AB0)siemens_psirt

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • FixedSIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants)siemens_psirt

    Update to V6.0.10 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109474550/
  • FixedSIMATIC S7-410 V10 CPU family (incl. SIPLUS variants)siemens_psirt

    Update to V10.1 or later version To obtain SIMATIC S7-410 V10.1 contact your local support.

  • FixedSIMATIC S7-410 V8 CPU family (incl. SIPLUS variants)siemens_psirt

    Update to V8.2.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109476571/
  • FixedSIPLUS S7-400 CPU 414-3 PN/DP V7 (6AG1414-3EM07-7AB0)siemens_psirt

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • FixedSIPLUS S7-400 CPU 416-3 PN/DP V7 (6AG1416-3ES07-7AB0)siemens_psirt

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • Fixed SIMATIC S7-400 CPU 412-2 PN/DP V7 (6ES7412-2EK07-0AB0)cisa_csaf_ot

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • Fixed SIMATIC S7-400 CPU 414-3 PN/DP V7 (6ES7414-3EM07-0AB0)cisa_csaf_ot

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • Fixed SIMATIC S7-400 CPU 414F-3 PN/DP V7 (6ES7414-3FM07-0AB0)cisa_csaf_ot

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • Fixed SIMATIC S7-400 CPU 416-3 PN/DP V7 (6ES7416-3ES07-0AB0)cisa_csaf_ot

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • Fixed SIMATIC S7-400 CPU 416F-3 PN/DP V7 (6ES7416-3FS07-0AB0)cisa_csaf_ot

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • FixedSIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants)cisa_csaf_ot

    Update to V6.0.10 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109474550/
  • FixedSIMATIC S7-410 V10 CPU family (incl. SIPLUS variants)cisa_csaf_ot

    Update to V10.1 or later version To obtain SIMATIC S7-410 V10.1 contact your local support.

  • FixedSIMATIC S7-410 V8 CPU family (incl. SIPLUS variants)cisa_csaf_ot

    Update to V8.2.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109476571/
  • FixedSIPLUS S7-400 CPU 414-3 PN/DP V7 (6AG1414-3EM07-7AB0)cisa_csaf_ot

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • FixedSIPLUS S7-400 CPU 416-3 PN/DP V7 (6AG1416-3ES07-7AB0)cisa_csaf_ot

    Update to V7.0.3 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109752685/
  • Mitigation SIMATIC S7-400 CPU 412-1 DP V7 (6ES7412-1XJ07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 412-2 DP V7 (6ES7412-2XK07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 412-2 PN/DP V7 (6ES7412-2EK07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 414-2 DP V7 (6ES7414-2XL07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 414-3 DP V7 (6ES7414-3XM07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 414-3 PN/DP V7 (6ES7414-3EM07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 414F-3 PN/DP V7 (6ES7414-3FM07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 416-2 DP V7 (6ES7416-2XP07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 416-3 DP V7 (6ES7416-3XS07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 416-3 PN/DP V7 (6ES7416-3ES07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 416F-2 DP V7 (6ES7416-2FP07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 416F-3 PN/DP V7 (6ES7416-3FS07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 417-4 DP V7 (6ES7417-4XT07-0AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIMATIC S7-410 V10 CPU family (incl. SIPLUS variants)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIMATIC S7-410 V8 CPU family (incl. SIPLUS variants)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIPLUS S7-400 CPU 414-3 PN/DP V7 (6AG1414-3EM07-7AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIPLUS S7-400 CPU 416-3 PN/DP V7 (6AG1416-3ES07-7AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIPLUS S7-400 CPU 416-3 V7 (6AG1416-3XS07-7AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIPLUS S7-400 CPU 417-4 V7 (6AG1417-4XT07-7AB0)siemens_psirt

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 412-1 DP V7 (6ES7412-1XJ07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 412-2 DP V7 (6ES7412-2XK07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 412-2 PN/DP V7 (6ES7412-2EK07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 414-2 DP V7 (6ES7414-2XL07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 414-3 DP V7 (6ES7414-3XM07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 414-3 PN/DP V7 (6ES7414-3EM07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 414F-3 PN/DP V7 (6ES7414-3FM07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 416-2 DP V7 (6ES7416-2XP07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 416-3 DP V7 (6ES7416-3XS07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 416-3 PN/DP V7 (6ES7416-3ES07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 416F-2 DP V7 (6ES7416-2FP07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 416F-3 PN/DP V7 (6ES7416-3FS07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • Mitigation SIMATIC S7-400 CPU 417-4 DP V7 (6ES7417-4XT07-0AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIMATIC S7-410 V10 CPU family (incl. SIPLUS variants)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIMATIC S7-410 V8 CPU family (incl. SIPLUS variants)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIPLUS S7-400 CPU 414-3 PN/DP V7 (6AG1414-3EM07-7AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIPLUS S7-400 CPU 416-3 PN/DP V7 (6AG1416-3ES07-7AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIPLUS S7-400 CPU 416-3 V7 (6AG1416-3XS07-7AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • MitigationSIPLUS S7-400 CPU 417-4 V7 (6AG1417-4XT07-7AB0)cisa_csaf_ot

    Limit access to port 102/tcp to trusted users and systems only

  • No fix planned SIMATIC S7-400 CPU 412-1 DP V7 (6ES7412-1XJ07-0AB0)siemens_psirt

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 412-2 DP V7 (6ES7412-2XK07-0AB0)siemens_psirt

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 414-2 DP V7 (6ES7414-2XL07-0AB0)siemens_psirt

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 414-3 DP V7 (6ES7414-3XM07-0AB0)siemens_psirt

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 416-2 DP V7 (6ES7416-2XP07-0AB0)siemens_psirt

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 416-3 DP V7 (6ES7416-3XS07-0AB0)siemens_psirt

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 416F-2 DP V7 (6ES7416-2FP07-0AB0)siemens_psirt

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 417-4 DP V7 (6ES7417-4XT07-0AB0)siemens_psirt

    Currently no fix is planned

  • No fix plannedSIPLUS S7-400 CPU 416-3 V7 (6AG1416-3XS07-7AB0)siemens_psirt

    Currently no fix is planned

  • No fix plannedSIPLUS S7-400 CPU 417-4 V7 (6AG1417-4XT07-7AB0)siemens_psirt

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 412-1 DP V7 (6ES7412-1XJ07-0AB0)cisa_csaf_ot

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 412-2 DP V7 (6ES7412-2XK07-0AB0)cisa_csaf_ot

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 414-2 DP V7 (6ES7414-2XL07-0AB0)cisa_csaf_ot

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 414-3 DP V7 (6ES7414-3XM07-0AB0)cisa_csaf_ot

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 416-2 DP V7 (6ES7416-2XP07-0AB0)cisa_csaf_ot

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 416-3 DP V7 (6ES7416-3XS07-0AB0)cisa_csaf_ot

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 416F-2 DP V7 (6ES7416-2FP07-0AB0)cisa_csaf_ot

    Currently no fix is planned

  • No fix planned SIMATIC S7-400 CPU 417-4 DP V7 (6ES7417-4XT07-0AB0)cisa_csaf_ot

    Currently no fix is planned

  • No fix plannedSIPLUS S7-400 CPU 416-3 V7 (6AG1416-3XS07-7AB0)cisa_csaf_ot

    Currently no fix is planned

  • No fix plannedSIPLUS S7-400 CPU 417-4 V7 (6AG1417-4XT07-7AB0)cisa_csaf_ot

    Currently no fix is planned

02

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 · 4.3–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9
v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · CISA US
v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · ENISA EU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · productcert@siemens.com DEexploitability 3.9 · impact 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · NVD / NIST USexploitability 3.9 · impact 3.6
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USCWE-119USCWE-119USCWE-119US
05

affected products (88)

Products and version ranges known to be affected.

showing 20 of 88
06

advisories (2)

Vendor and ecosystem advisories describing this.

  • SSA-557541SSA-557541: Denial-of-Service Vulnerability in SIMATIC S7-400 CPUs2022-04-12csaf · siemens_psirtDE

    SIMATIC S7-400 CPU devices contain an input validation vulnerability that could allow an attacker to create a Denial-of-Service condition. A restart is needed to restore normal operations. Siemens has released an update for SIMATIC S7-410 V10 CPU family and SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants for both) and recommends to update to the latest version. Siemens is preparing further updates and recommends specific countermeasures for products where updates are not yet available.

  • ICSA-22-104-12Siemens SIMATIC S7-4002022-04-12icsa · cisa_csaf_otUS

    SIMATIC S7-400 CPU devices contain an input validation vulnerability that could allow an attacker to create a Denial-of-Service condition. A restart is needed to restore normal operations. Siemens has released an update for SIMATIC S7-410 V10 CPU family and SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants for both) and recommends to update to the latest version. Siemens is preparing further updates and recommends specific countermeasures for products where updates are not yet available.

07

also known as (4)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otsiemens_psirtNVDCVE.orgMITRE
published 2022-04-12modified 2026-06-17
09

references (8)

External citations — patches, advisories, analysis.

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