CVE-2021-34584 | BDVDB-2026-163255 Detail

CODESYSCODESYS V2

Description#

Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

CWE-126 Buffer Over-read

References#

Exploit#

No public exploit known

History#

Version 12021-10-26Record published in the CVE List.
Version 22024-09-16Most recent update recorded in the CVE List.

Published

Published: 2021-10-26
Last modified: 2024-09-16

Vendor information

Vendor: CODESYS
Product: CODESYS V2

All CODESYS vulnerabilities

Score

9.1 Critical

EPSS

1.0%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 65.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= all web servers and < V1.1.9.22
Fixed
V1.1.9.22

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.1 Critical

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).