Information disclosure in Siemens Simatic Pcs 7
CVE-2021-40363
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component stores the credentials of a local system account in a potentially publicly accessible project file using an outdated cipher algorithm.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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (4.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 4.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Siemens Simatic Pcs 7 — versions 9.0, 9.1
- Siemens Simatic Pcs 7 V8.2 — versions All versions
- Siemens Simatic Pcs 7 V9.0 — versions All versions
- Siemens Simatic Pcs 7 V9.1 — versions All versions < V9.1 SP1
- Siemens Simatic Wincc — versions 7.4, 7.5, 13
- Siemens Simatic Wincc V15 And Earlier — versions All versions < V15 SP1 Update 7
- Siemens Simatic Wincc V16 — versions All versions < V16 Update 5
- Siemens Simatic Wincc V17 — versions All versions < V17 Update 2, All versions <= V17 Update 4
- Siemens Simatic Wincc V7.4 — versions All versions < V7.4 SP1 Update 19
- Siemens Simatic Wincc V7.5 — versions All versions < V7.5 SP2 Update 6
Weakness classification (CWE)
References
- cert-portal.siemens.com/productcert/pdf/ssa-914168.pdf (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-40363?
- CVE-2021-40363 is a high-severity vulnerability in Siemens Simatic Pcs 7, classified under Insertion of Sensitive Information into Externally-Accessible File or Directory. CVSS score: 7.8/10. Published 2022-02-09.
- How severe is CVE-2021-40363?
- High severity. CVSS v3 base score is 7.8 out of 10.