CVE Tools
Sign in

CVE-2021-31894

A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.X (All versions < V9.1 SP2), SIMATIC PDM (All versions < V9.2 SP2), SIMATIC STEP 7 V5.X (All v...

Published: Jul 13, 2021Updated: Nov 21, 2024 Sources: CVE List NVD csafCWE-732
8.8HIGH
NVD MITRE
EPSS Score
0.2%
Top 86.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

Multiple SIMATIC software products are affected by a vulnerability that could allow an attacker to change the content of certain metafiles and subsequently manipulate parameters or behaviour of devices configured by the affected software products. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens is preparing further updates and recommends specific countermeasures for products where updates are not, or not yet available.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:CC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-732

Affected Products

Siemens
commercial·DEaka siemens ag
SIMATIC PCS 7 V8.2 and earlier
ICS / OT / IoT
SIMATIC PCS 7 V9.X
ICS / OT / IoT
SIMATIC PDM
ICS / OT / IoT
SIMATIC STEP 7 V5.X
ICS / OT / IoT
SINAMICS STARTER (containing STEP 7 OEM version)
ICS / OT / IoT
simatic pcs 7 firmware
ICS / OT / IoT
simatic pdm firmware
ICS / OT / IoT
simatic step 7 firmware
ICS / OT / IoT
and 1 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-31894?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://cert-portal.siemens.com/productcert/csaf/ssa-661034.json
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/txt/ssa-661034.txt
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/pdf/ssa-661034.pdf
cert-portal.siemens.com
and 8 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-31894 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows