CVE-2021-30187

CODESYS V2 runtime system SP before 2.4.7.55 has Improper Neutralization of Special Elements used in an OS Command.

Published: 2021-05-25 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-30187 is rated Low Risk (27.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.27%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-30187

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.12% 0.27% +0.15%
2 2025-06-05 0.16% 0.12% -0.04%
3 2025-03-19 — 0.16% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-30187

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.8 3.4 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2021-30187

Affected software / configurations for CVE-2021-30187

Vendor Product Version Raw CPE
wago 750-893_firmware < fw08 cpe:2.3:o:wago:750-893_firmware:*:*:*:*:*:*:*:*
wago 750-891_firmware < fw08 cpe:2.3:o:wago:750-891_firmware:*:*:*:*:*:*:*:*
wago 750-890_firmware < fw08 cpe:2.3:o:wago:750-890_firmware:*:*:*:*:*:*:*:*
wago 750-889_firmware < fw15 cpe:2.3:o:wago:750-889_firmware:*:*:*:*:*:*:*:*
wago 750-885_firmware < fw15 cpe:2.3:o:wago:750-885_firmware:*:*:*:*:*:*:*:*
wago 750-882_firmware < fw15 cpe:2.3:o:wago:750-882_firmware:*:*:*:*:*:*:*:*
wago 750-881_firmware < fw15 cpe:2.3:o:wago:750-881_firmware:*:*:*:*:*:*:*:*
wago 750-880_firmware < fw16 cpe:2.3:o:wago:750-880_firmware:*:*:*:*:*:*:*:*
wago 750-862_firmware < fw08 cpe:2.3:o:wago:750-862_firmware:*:*:*:*:*:*:*:*
wago 750-852_firmware < fw15 cpe:2.3:o:wago:750-852_firmware:*:*:*:*:*:*:*:*
wago 750-832_firmware < fw08 cpe:2.3:o:wago:750-832_firmware:*:*:*:*:*:*:*:*
wago 750-831_firmware < fw15 cpe:2.3:o:wago:750-831_firmware:*:*:*:*:*:*:*:*
wago 750-829_firmware < fw15 cpe:2.3:o:wago:750-829_firmware:*:*:*:*:*:*:*:*
wago 750-8202_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8202_firmware:*:*:*:*:*:*:*:*
wago 750-8203_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8203_firmware:*:*:*:*:*:*:*:*
wago 750-8204_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8204_firmware:*:*:*:*:*:*:*:*
wago 750-8206_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8206_firmware:*:*:*:*:*:*:*:*
wago 750-8207_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8207_firmware:*:*:*:*:*:*:*:*
wago 750-8208_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8208_firmware:*:*:*:*:*:*:*:*
wago 750-8210_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8210_firmware:*:*:*:*:*:*:*:*
wago 750-8211_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8211_firmware:*:*:*:*:*:*:*:*
wago 750-8212_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8212_firmware:*:*:*:*:*:*:*:*
wago 750-8213_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8213_firmware:*:*:*:*:*:*:*:*
wago 750-8214_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8214_firmware:*:*:*:*:*:*:*:*
wago 750-8216_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8216_firmware:*:*:*:*:*:*:*:*
wago 750-8217_firmware < 03.06.19_\(18\) cpe:2.3:o:wago:750-8217_firmware:*:*:*:*:*:*:*:*
codesys runtime_toolkit < 2.4.7.55 cpe:2.3:a:codesys:runtime_toolkit:*:*:*:*:*:*:x86:*
wago 750-823_firmware < fw08 cpe:2.3:o:wago:750-823_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-30187

cvelogic Threat Intelligence