CODESYS Development System up to 3.5.21.40 default permission

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in CODESYS Development System. Affected by this vulnerability is an unknown functionality. Such manipulation leads to default permission. This vulnerability is listed as CVE-2026-44468. The attack must be carried out locally. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in CODESYS Development System. Affected by this issue is an unknown functionality. The manipulation with an unknown input leads to a default permission vulnerability. Using CWE to declare the problem leads to CWE-276. During installation, installed file permissions are set to allow anyone to modify those files. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The affected product creates a directory with insecure default permissions during administrative installation. This allows a low-privileged local attacker to modify a temporary file defining the components to be installed, enabling local privilege escalation by forcing the deployment of arbitrary components.

The weakness was presented by David Ruscheweyh as VDE-2026-055. The advisory is available at certvde.com. This vulnerability is handled as CVE-2026-44468 since 05/06/2026. The exploitation is known to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

Upgrading to version 3.5.22.20 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-31798) and CERT Bund (WID-SEC-2026-1675). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • CODESYS CODESYS

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (CERTVDE): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Default permission
CWE: CWE-276 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Development System 3.5.22.20

Timelineinfo

05/06/2026 CVE reserved
05/26/2026 +20 days Advisory disclosed
05/26/2026 +0 days VulDB entry created
05/27/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: VDE-2026-055
Researcher: David Ruscheweyh
Status: Confirmed

CVE: CVE-2026-44468 (🔒)
GCVE (CVE): GCVE-0-2026-44468
GCVE (VulDB): GCVE-100-365618
EUVD: 🔒
CERT Bund: WID-SEC-2026-1675 - CODESYS: Mehrere Schwachstellen

Entryinfo

Created: 05/26/2026 11:41
Updated: 05/27/2026 10:14
Changes: 05/26/2026 11:41 (77), 05/26/2026 13:56 (1), 05/27/2026 10:14 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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