Siemens SIMATIC WinCC Unified PC Runtime V21 Certificate cleartext storage in file

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k1.27-

Summaryinfo

A vulnerability classified as problematic has been found in Siemens SIMATIC WinCC Unified PC Runtime V16, SIMATIC WinCC Unified PC Runtime V17, SIMATIC WinCC Unified PC Runtime V18, SIMATIC WinCC Unified PC Runtime V19, SIMATIC WinCC Unified PC Runtime V20 and SIMATIC WinCC Unified PC Runtime V21. This affects an unknown function of the component Certificate Handler. This manipulation causes cleartext storage in file. This vulnerability is tracked as CVE-2026-24349. The attack is restricted to local execution. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Siemens SIMATIC WinCC Unified PC Runtime V16, SIMATIC WinCC Unified PC Runtime V17, SIMATIC WinCC Unified PC Runtime V18, SIMATIC WinCC Unified PC Runtime V19, SIMATIC WinCC Unified PC Runtime V20 and SIMATIC WinCC Unified PC Runtime V21. Affected by this vulnerability is some unknown processing of the component Certificate Handler. The manipulation with an unknown input leads to a cleartext storage in file vulnerability. The CWE definition for the vulnerability is CWE-313. The product stores sensitive information in cleartext in a file, or on disk. As an impact it is known to affect confidentiality. The summary by CVE is:

A vulnerability has been identified in SIMATIC WinCC Unified PC Runtime V16 (All versions), SIMATIC WinCC Unified PC Runtime V17 (All versions), SIMATIC WinCC Unified PC Runtime V18 (All versions), SIMATIC WinCC Unified PC Runtime V19 (All versions), SIMATIC WinCC Unified PC Runtime V20 (All versions), SIMATIC WinCC Unified PC Runtime V21 (All versions < V21 Update 2). Insufficient protection of key material in WinCC Certificate Manager that could allow an attacker to extract sensitive information.

It is possible to read the advisory at cert-portal.siemens.com. This vulnerability is known as CVE-2026-24349 since 01/22/2026. The exploitation appears to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1555 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability.

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Productinfo

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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: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (siemens): 🔒

CVSSv2info

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

Exploitinginfo

Class: Cleartext storage in file
CWE: CWE-313 / CWE-312 / CWE-310
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: 🔒

Timelineinfo

01/22/2026 CVE reserved
06/09/2026 +137 days Advisory disclosed
06/09/2026 +0 days VulDB entry created
06/09/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-063511
Status: Confirmed

CVE: CVE-2026-24349 (🔒)
GCVE (CVE): GCVE-0-2026-24349
GCVE (VulDB): GCVE-100-369487

Entryinfo

Created: 06/09/2026 12:34
Changes: 06/09/2026 12:34 (75)
Complete: 🔍
Cache ID: 216::103

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