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Fencer Vulns
high 7.1

CVE-2026-24349 json

A vulnerability has been identified in SIMATIC WinCC Unified PC Runtime V16 (All versions), SIMATIC WinCC Unified PC Runtime V17 (All versi…

published 2026-06-09 5 mo ago modified 2026-10-23 16 d ago also EUVD-2026-35382

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits
0
none known

Summary

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.

Patch / fix

  • Siemens SIMATIC WinCC Unified PC Runtime V21 V21 Update 2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-174-01 updated cvss 7.1

Siemens WinCC Certificate Manager

  • Siemens SIMATIC WinCC Unified PC Runtime V16 Siemens SIMATIC WinCC Unified PC Runtime V17 Siemens SIMATIC WinCC Unified PC Runtime V18 Siemens SIMATIC WinCC Unified PC Runtime V19 Siemens SIMATIC WinCC Unified PC Runtime V20
    affected: mitigation, no fix planned
  • Siemens SIMATIC WinCC Unified PC Runtime V21 < 21.0.2
    affected: fixed in V21, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.06% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CNA 4.0 8.2 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
CNA 4.0 8.2 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Siemens SIMATIC WinCC Unified PC Runtime V16
  • Siemens SIMATIC WinCC Unified PC Runtime V17
  • Siemens SIMATIC WinCC Unified PC Runtime V18
  • Siemens SIMATIC WinCC Unified PC Runtime V19
  • Siemens SIMATIC WinCC Unified PC Runtime V20
  • Siemens SIMATIC WinCC Unified PC Runtime V21

Classification

Weakness
  • CWE-313 Cleartext Storage in a File or on Disk

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.