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01 Record

CVE-2021-40358

A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3 UC04), SIMATIC PCS 7 V9.1 (All versions < V9.1 SP1), SIMATIC WinCC V15 and earlier

CriticalPUBLISHEDCNA: siemens
CNA base score9.9 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C

02 Description

A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3 UC04), SIMATIC PCS 7 V9.1 (All versions < V9.1 SP1), SIMATIC WinCC V15 and earlier

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
1.27% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 69.4% of scored records. A rank, not a probability.
NVD base score
9.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-11-09 11:32Z4 YR AGO
Last updated
2024-08-04 02:44Z2 YR AGO
Reserved
2021-09-01
Assigning CNA
siemens
Record state
PUBLISHED
Severity
Critical (CVSS 9.9)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
Weaknesses
  • CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base
Data version
5.1
Document digest
ea15143d6f62c564227f69183ef25975baecb8512c824361d34a69cbce34a4ca

05 Affected products

VendorProductVersionsPlatforms
SiemensSIMATIC PCS 7 V8.2All versions—
SiemensSIMATIC PCS 7 V9.0All versions < V9.0 SP3 UC04—
SiemensSIMATIC PCS 7 V9.1All versions < V9.1 SP1—
SiemensSIMATIC WinCC V15 and earlierAll versions < V15 SP1 Update 7—
SiemensSIMATIC WinCC V16All versions < V16 Update 5—
SiemensSIMATIC WinCC V17All versions < V17 Update 2—
SiemensSIMATIC WinCC V7.4All versions < V7.4 SP1 Update 19—
SiemensSIMATIC WinCC V7.5All versions < V7.5 SP2 Update 5—

06 References