7.5

CVE-2021-34593: codesys codesys v2

CVSS: 7.5v3.1HighAnalyzed
Published 26-10-2021Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2021-34593 is a high (CVSS 7.5) vulnerability in codesys codesys v2. EPSS estimates a 2.66% chance of exploitation in the next 30 days, higher than 85.5% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
41/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
2.66%
0%100%
Low · -0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2reference

Timeline

  1. 26-10-2021
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

In CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56 unauthenticated crafted invalid requests may result in several denial-of-service conditions. Running PLC programs may be stopped, memory may be leaked, or further communication clients may be blocked from accessing the PLC.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

2.66%

Chance of exploitation in the next 30 days

Percentile

86%

Versus all other CVEs

30-day change

-0.07 pp

From 2.74% on 20-09-2026

20-09-202620-10-2026
EPSS score
2.66%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

2 found
  • referenceUnverified

    Exploit Reference (packetstormsecurity.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (packetstormsecurity.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Wago13 products
Codesys3 products

2 vendors · 16 products

References

4 links