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Vulnerability · Published Jul 13, 2021 · Assigned by siemens

CVE-2021-31893

High 7.8

In plain English

A high-severity buffer overflow in SIMATIC PCS 7 V8.2 and earlier from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.6%top 53.0% 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 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3), SIMATIC PDM (All versions < V9.2), SIMATIC STEP 7 V5.X (All versions < V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions < V5.4 HF2). The affected software contains a buffer overflow vulnerability while handling certain files that could allow a local attacker to trigger a denial-of-service condition or potentially lead to remote code execution.

Affected products (as reported)

VendorProductVersions
Siemens SIMATIC PCS 7 V8.2 and earlier All versions
Siemens SIMATIC PCS 7 V9.0 All versions < V9.0 SP3
Siemens SIMATIC PDM All versions < V9.2
Siemens SIMATIC STEP 7 V5.X All versions < V5.6 SP2 HF3
Siemens SINAMICS STARTER (containing STEP 7 OEM version) All versions < V5.4 HF2

Weakness: CWE-120

References