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 versio…

published 2022-02-09 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-27541

cvss: 7.8; 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 5%
public exploits: 0; none known

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component stores the credentials of a local system account in a potentially publicly accessible project file using an outdated cipher algorithm.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.

Patch / fix

fixed in 1 links 1

siemens simatic_wincc 7.4

cert-portal.siemens.com/productcert/pdf/ssa-914168.pdf advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-22-041-02 updated 2022-08-09 cvss 5.5

Siemens SIMATIC WinCC and PCS

Siemens SIMATIC PCS 7 V8.2
affected: vendor fix, mitigation, no fix planned support.industry.siemens.com
Siemens SIMATIC PCS 7 V9.0
affected: fixed in V9.0, mitigation support.industry.siemens.com
Siemens SIMATIC PCS 7 V9.1 <V9.1_SP1
affected: fixed in V9.1, mitigation support.industry.siemens.com
Siemens SIMATIC WinCC V7.4 <V7.4_SP1_Update_19
affected: fixed in V7.4, mitigation support.industry.siemens.com
Siemens SIMATIC WinCC V7.5 <V7.5_SP2_Update_6
affected: fixed in V7.5, mitigation support.industry.siemens.com
Siemens SIMATIC WinCC V15 and earlier <V15_SP1_Update_7
affected: fixed in V15, mitigation support.industry.siemens.com
Siemens SIMATIC WinCC V16 <V16_Update_5
affected: fixed in V16, mitigation support.industry.siemens.com
Siemens SIMATIC WinCC V17 <V17_Update_2, >=V17_Update_2_<V17_Update_4
affected: fixed in V17, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

Siemens SIMATIC PCS 7 V8.2
Siemens SIMATIC PCS 7 V9.0
Siemens SIMATIC PCS 7 V9.1
Siemens SIMATIC WinCC V15 and earlier
Siemens SIMATIC WinCC V16
Siemens SIMATIC WinCC V17
Siemens SIMATIC WinCC V7.4
Siemens SIMATIC WinCC V7.5

Classification

Weakness

CWE-538 Insertion of Sensitive Information into Externally-Accessible File or Directory
CWE-312 Cleartext Storage of Sensitive Information

References

cert-portal.siemens.com /productcert/pdf/ssa-914168.pdf
patch, vendor-advisory

Sources

CVE List CVE-2021-40363
NVD CVE-2021-40363

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary