CVE-2021-25675 json
A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions).
published 2021-03-15 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-12567
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 14%
- public exploits
- 0
- none known
Summary
A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with local access to the system could cause a Denial-of-Service condition in the application when it is used to open a specially crafted file. As a consequence, a divide by zero operation could occur and cause the application to terminate unexpectedly and must be restarted to restore the service.
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-21-068-01 updated cvss 5.5
Siemens SIMATIC S7-PLCSIM
-
Siemens SIMATIC S7-PLCSIM V5.4affected: mitigation
Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- Siemens SIMATIC S7-PLCSIM V5.4
Classification
- Weakness
-
- CWE-369 Divide By Zero
References
-
cert-portal.siemens.com
/productcert/pdf/ssa-256092.pdf
vendor-advisory
Sources
- CVE List CVE-2021-25675
- NVD CVE-2021-25675
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