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Vulnerability · Published Feb 9, 2022 · Assigned by siemens

CVE-2021-40363

High 7.8

In plain English

A high-severity security flaw in SIMATIC PCS 7 V8.2 from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.2%top 94.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions), 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 V17 (All versions <= V17 Update 4), SIMATIC WinCC V7.4 (All versions < V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 6). The affected component stores the credentials of a local system account in a potentially publicly accessible project file using an outdated cipher algorithm. An attacker may use this to brute force the credentials and take over the system.

Affected products (as reported)

VendorProductVersions
Siemens SIMATIC PCS 7 V8.2 All versions
Siemens SIMATIC PCS 7 V9.0 All versions
Siemens SIMATIC PCS 7 V9.1 All versions < V9.1 SP1
Siemens SIMATIC WinCC V15 and earlier All versions < V15 SP1 Update 7
Siemens SIMATIC WinCC V16 All versions < V16 Update 5
Siemens SIMATIC WinCC V17 All versions < V17 Update 2
Siemens SIMATIC WinCC V17 All versions <= V17 Update 4
Siemens SIMATIC WinCC V7.4 All versions < V7.4 SP1 Update 19
Siemens SIMATIC WinCC V7.5 All versions < V7.5 SP2 Update 6

Weakness: CWE-538

References