CVE-2021-21000

mediumpriority · track · 30EPSS 0.010 · 64 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.04% (64th) EPSS
CVSS 5 · medium
Is it mine?
108 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · fstec_bdu · wago_psirt

EPSS · scored 2026-10-27

On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.

01

remediations

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

A vendor fix is available.

  • Fixedwago_psirt

    Endress+Hauser provides updated firmware versions for all related products from the Proline portfolio which fixes the vulnerability and recommends customers to update to the new fixed version. For support, please contact your local service center.

  • Mitigationwago_psirt

    If an immediate firmware update is not possible, the WLAN on the unit can also be switched off as a precautionary measure.

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 · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · info@cert.vde.comexploitability 3.9 · impact 1.4
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · WAGO PSIRT DE
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU
v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770USprimaryCWE-770USCWE-770US
04

affected products (108)

Products and version ranges known to be affected.

showing 20 of 108
05

advisories (1)

Vendor and ecosystem advisories describing this.

  • VDE-2021-014WAGO: Multiple Vulnerabilities in CODESYS Runtime 2.32021-05-20csaf · wago_psirtDE

    Multiple vulnerabilities were reported in CODESYS 2.3 Runtime. The CODESYS 2.3 Runtime is an essential component in several WAGO PLC's.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduwago_psirtNVDCVE.orgMITRE
published 2021-05-24modified 2026-06-17
09

references (3)

External citations — patches, advisories, analysis.

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