CVE-2021-27389

highpriority · track · 39OT risk · elevatedEPSS 0.010 · 64 %ileDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
1.03% (64th) EPSS
CVSS 7.5 · high
Is it mine?
8 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A vulnerability has been identified in Opcenter Quality (All versions < V12.2), QMS Automotive (All versions < V12.30). A private sign key is shipped with the product without adequate protection.

01

remediations

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

No vendor fix yet; a mitigation is available.

  • MitigationOpcenter Qualitysiemens_psirt

    Explicitly distrust the certificate with the fingerprint FA:53:A4:74:FC:1E:16:6F:E6:6A:D2:5A:C1:E6: 8B:B1:91:CB:38:E9:85:7E:07:79:C1:A5:C3:59:1A:5A:04:96

  • MitigationQMS Automotivesiemens_psirt

    Explicitly distrust the certificate with the fingerprint FA:53:A4:74:FC:1E:16:6F:E6:6A:D2:5A:C1:E6: 8B:B1:91:CB:38:E9:85:7E:07:79:C1:A5:C3:59:1A:5A:04:96

  • No fix availableOpcenter Qualitysiemens_psirt

    Currently no remediation is available

  • No fix availableQMS Automotivesiemens_psirt

    Currently no remediation is available

02

cvss

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

10.0
010

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

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9
v3.110criticalAV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:U/RC:Csecondary · Siemens ProductCERT DE
v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-321USCWE-321USCWE-321US
04

affected products (8)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • SSA-788287SSA-788287: Disclosure of Private Data2021-04-13csaf · siemens_psirtDE

    Due to SmartClient Installation technology (ClickOnce) a customer/integrator needs to create a customer specific Smartclient installer. The mentioned products delivered a trusted but yet expired codesigning certificate. An attacker could have exploited the vulnerability by spoofing the code-signing certificate and signing a malicious executable resulting in having a trusted digital signature from a trusted provider. The certificate was revoked immediately.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bdunvdsiemens_psirtNVDCVE.orgMITRE
published 2021-04-22modified 2026-06-17
08

references (6)

External citations — patches, advisories, analysis.

scry

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