5.5

CVE-2021-40364: siemens simatic_pcs_7

CVSS: 5.5v3.1MediumModified
Published 09-11-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-40364 is a medium (CVSS 5.5) vulnerability in siemens simatic_pcs_7. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.2% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-11-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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 (All versions < V15 SP1 Update 7), SIMATIC WinCC V16 (All versions < V16 Update 5), SIMATIC WinCC V17 (All versions < V17 Update 2), SIMATIC WinCC V7.4 (All versions < V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 5). The affected systems store sensitive information in log files. An attacker with access to the log files could publicly expose the information or reuse it to develop further attacks on the system.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

0.00 pp

From 0.24% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Siemens10 products
  • simatic_pcs_7≤ 8.2 | ≥ 9.0, < 9.1 | 9.1
  • simatic pcs 7 v8.2All versions (No fix recorded)
  • simatic pcs 7 v9.0All versions < V9.0 SP3 UC04
  • simatic pcs 7 v9.1All versions < V9.1 SP1
  • simatic_wincc≤ 7.4 | 7.5 | 7.5:sp1 | 7.5:sp1_update1 | 7.5:sp1_update2 | 7.5:sp2 | 7.5:sp2_update1 | 7.5:sp2_update2 | 7.5:sp2_update3 | 7.5:sp2_update4 | 15 | 16 | 16:update1 | 16:update2 | 16:update3 | 16:update4 | 17 | 17:update1

1 vendor · 10 products

References

1 links