CVE-2021-30189: codesys v2_web_server Out-of-bounds Write
CVSS: 9.8v3.1CriticalAnalyzed
Published 25-05-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-30189 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in codesys v2_web_server. EPSS estimates a 1.24% chance of exploitation in the next 30 days, higher than 68.6% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
1.24%
0%100%
Low · -0.03 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 25-05-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
CODESYS V2 Web-Server before 1.1.9.20 has a Stack-based Buffer Overflow.
CVSS metrics
2 scores · 1 source · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.24%
Chance of exploitation in the next 30 days
Percentile
69%
Versus all other CVEs
30-day change
-0.03 pp
From 1.27% on 19-09-2026
19-09-202619-10-2026
EPSS score1.24%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Wago27 products
- 750-8202_firmware< 03.06.19_\(18\)
- 750-8203_firmware< 03.06.19_\(18\)
- 750-8204_firmware< 03.06.19_\(18\)
- 750-8206_firmware< 03.06.19_\(18\)
- 750-8207_firmware< 03.06.19_\(18\)
Codesys1 product
- v2_web_server< 1.1.9.20
2 vendors · 28 products