How severe is CVE-2026-24349?

CVE-2026-24349 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-24349 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-24349?

CVE-2026-24349 primarily affects Siemens Simatic Wincc Unified Pc Runtime. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-24349?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-24349 have an EU (EUVD) identifier?

Yes. CVE-2026-24349 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35382.

When was CVE-2026-24349 published?

CVE-2026-24349 was published on 2026-06-09 and last updated on 2026-06-26.

CVE-2026-24349

CVE-2026-24349 is a high-severity vulnerability in Siemens Simatic Wincc Unified Pc Runtime with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-313.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v4: 8.2
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35382
Weakness: CWE-313
Affected product: Siemens Simatic Wincc Unified Pc Runtime
Published: 2026-06-09
Last modified: 2026-06-26

Description

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.

Frequently asked questions

What is CVE-2026-24349?: 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.
How severe is CVE-2026-24349?: CVE-2026-24349 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-24349 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-24349?: CVE-2026-24349 primarily affects Siemens Simatic Wincc Unified Pc Runtime. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-24349?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-24349 have an EU (EUVD) identifier?: Yes. CVE-2026-24349 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35382.
When was CVE-2026-24349 published?: CVE-2026-24349 was published on 2026-06-09 and last updated on 2026-06-26.

References

https://cert-portal.siemens.com/productcert/html/ssa-063511.html

Affected products (3)

cpe:2.3:a:siemens:simatic_wincc_unified_pc_runtime:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:simatic_wincc_unified_pc_runtime:21:-:*:*:*:*:*:*
cpe:2.3:a:siemens:simatic_wincc_unified_pc_runtime:21:update1:*:*:*:*:*:*

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