CVE-2020-7586

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). A buffer overflow vulnerability could allow a local attacker to cause a Denial-of-Service situation. The security vulnerability could be exploited by an attacker with local access to the affected systems. Successful exploitation requires user privileges but no user interaction. The vulnerability could allow an attacker to compromise the availability of the system as well as to have access to confidential information.

Published: 2020-06-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-7586 is rated Moderate Risk (42.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.40%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-7586

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.15% 0.40% +0.25%
2 2025-06-12 0.11% 0.15% +0.04%
3 2025-03-30 — 0.11% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-7586

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2020-7586

Affected software / configurations for CVE-2020-7586

Vendor Product Version Raw CPE
siemens simatic_pcs_7 — cpe:2.3:a:siemens:simatic_pcs_7:*:*:*:*:*:*:*:*
siemens simatic_process_device_manager — cpe:2.3:a:siemens:simatic_process_device_manager:*:*:*:*:*:*:*:*
siemens simatic_step_7 < 5.6 cpe:2.3:a:siemens:simatic_step_7:*:*:*:*:*:*:*:*
siemens simatic_step_7 5.6 cpe:2.3:a:siemens:simatic_step_7:5.6:-:*:*:*:*:*:*
siemens simatic_step_7 5.6 cpe:2.3:a:siemens:simatic_step_7:5.6:sp1:*:*:*:*:*:*
siemens simatic_step_7 5.6 cpe:2.3:a:siemens:simatic_step_7:5.6:sp2:*:*:*:*:*:*
siemens simatic_step_7 5.6 cpe:2.3:a:siemens:simatic_step_7:5.6:sp2_hotfix1:*:*:*:*:*:*
siemens sinamics_starter < 5.4 cpe:2.3:a:siemens:sinamics_starter:*:*:*:*:*:*:*:*
siemens sinamics_starter 5.4 cpe:2.3:a:siemens:sinamics_starter:5.4:-:*:*:*:*:*:*

References for CVE-2020-7586

cvelogic Threat Intelligence