CVE-2021-30193

highpriority · track · 39EPSS 0.011 · 66 %ileDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
1.12% (66th) EPSS
CVSS 7.5 · high
Is it mine?
59 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

CODESYS V2 Web-Server before 1.1.9.20 has an Out-of-bounds Write.

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.

  • MitigationCODESYS reports all CODESYS V2 web servers running stand-alone or as part of the CODESYS runtime systemcisa_csaf_ot

    Activate and apply user management and password features.

02

cvss

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

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

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
v3.09.8criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · CISA US
v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · WAGO PSIRT 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-787USprimaryCWE-787USCWE-787USCWE-787US
04

affected products (59)

Products and version ranges known to be affected.

showing 20 of 59
05

advisories (2)

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.

  • ICSA-21-173-02CODESYS V2 web server2021-06-22icsa · cisa_csaf_otUS

    Successful exploitation of these vulnerabilities may allow an attacker to read or write arbitrary memory or files in the CODESYS Control runtime system, cause invalid memory accesses to execute code, or crash the CODESYS web server or CODESYS Control runtime system.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otnvdwago_psirtNVDCVE.orgMITRE
published 2021-05-25modified 2026-06-17
09

references (9)

External citations — patches, advisories, analysis.

scry

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