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CVE-2021-30195

26
FAUCET Score

CVE-2021-30195 is a high-severity improper input validation vulnerability affecting the CODESYS V2 runtime system prior to version 2.4.7.55, impacting products from vendors like CODESYS and WAGO. This network-exploitable vulnerability, with low attack complexity, could lead to a complete denial of service. While no public exploits or active exploitation have been observed, and media coverage is absent, there has been minimal community discussion regarding related CODESYS vulnerabilities.

Impacted Technologies

VendorProductVersion(s)CPE
< fw08CPE matchmatch criteria
cpe:2.3:o:wago:750-893_firmware:*:*:*:*:*:*:*:*
< fw08CPE matchmatch criteria
cpe:2.3:o:wago:750-891_firmware:*:*:*:*:*:*:*:*
< fw08CPE matchmatch criteria
cpe:2.3:o:wago:750-890_firmware:*:*:*:*:*:*:*:*
< fw15CPE matchmatch criteria
cpe:2.3:o:wago:750-889_firmware:*:*:*:*:*:*:*:*
< fw15CPE matchmatch criteria
cpe:2.3:o:wago:750-885_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
7.18%
Probability of exploitation in next 30 days
EPSS Percentile
93.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0718 is in the 89th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (6)

capnprotovendor investigatingvia llm_extracted
gcpvendor investigatingvia llm_extracted
hanwhavendor investigatingvia llm_extracted
kongvendor investigatingvia llm_extracted
openwrtvendor investigatingvia llm_extracted
proxmoxvendor investigatingvia llm_extracted

Vendor Advisories (12)

capnprotollm-capnproto-40dccc5717758cf8CRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 20, 2021
openwrtllm-openwrt-df2887aa05ab23b2CRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 20, 2021
gcpllm-gcp-3ee62bc7c70f8b24CRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 20, 2021
kongllm-kong-93595c6ddaf69518CRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 20, 2021
hanwhallm-hanwha-0f90c69122cbe38dCRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 20, 2021
proxmoxllm-proxmox-59229dd29c6931c6CRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 20, 2021
hanwhallm-hanwha-347a955295790f01CRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 9, 2021
capnprotollm-capnproto-4bf742530b15c428CRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 9, 2021
kongllm-kong-bc51a4f40d1d92ebCRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 9, 2021
openwrtllm-openwrt-c4083080729d35abCRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 9, 2021
proxmoxllm-proxmox-e99f47d731b8c8d0CRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 9, 2021
gcpllm-gcp-6c4b43aea4a77434CRITICAL

Vulnerabilities in CODESYS V2 runtime systems

Jul 9, 2021

References

customers.codesys.com / index.php
Permissions RequiredVendor Advisory
customers.codesys.com / index.php
Vendor Advisory