CVE-2020-7587· NVD / CVE Program· CNA siemens

A vulnerability has been identified in Opcenter Execution Discrete (All versions < V3.2), Opcenter Execution Foundation (All versions < V3.2

Noroxi assessment

Priority: Monitor (action score 33/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 2.4% (FIRST EPSS); higher than 84.3% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A vulnerability has been identified in Opcenter Execution Discrete (All versions < V3.2), Opcenter Execution Foundation (All versions < V3.2), Opcenter Execution Process (All versions < V3.2), Opcenter Intelligence (All versions < V3.3), Opcenter Quality (All versions < V11.3), Opcenter RD&L (V8.0), SIMATIC IT LMS (All versions < V2.6), SIMATIC IT Production Suite (All versions < V8.0), SIMATIC Notifier Server for Windows (All versions), SIMATIC PCS neo (All versions < V3.0 SP1), SIMATIC STEP 7 (TIA Portal) V15 (All versions < V15.1 Update 5), SIMATIC STEP 7 (TIA Portal) V16 (All versions < V16 Update 2), SIMOCODE ES V15.1 (All versions < V15.1 Update 4), SIMOCODE ES V16 (All versions < V16 Update 1), Soft Starter ES V15.1 (All versions < V15.1 Update 3), Soft Starter ES V16 (All versions < V16 Update 1). Sending multiple specially crafted packets to the affected service could cause a partial remote denial-of-service, that would cause the service to restart itself. On some cases the vulnerability could leak random information from the remote service.

HighCVSS 8.2 · v3.1—No exploit No fix recorded

BDU:2022-04936

Published: Jul 14, 2020
Updated: Jun 16, 2026
EPSS: 2.4% · 84th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 32 / 40 · 8.2 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 2.4%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
siemens	opcenter execution discrete	cpe:2.3:a:siemens:opcenter_execution_discrete
siemens	opcenter execution foundation	cpe:2.3:a:siemens:opcenter_execution_foundation
siemens	opcenter execution process	cpe:2.3:a:siemens:opcenter_execution_process
siemens	opcenter intelligence	cpe:2.3:a:siemens:opcenter_intelligence
siemens	opcenter quality	cpe:2.3:a:siemens:opcenter_quality
siemens	opcenter rd\&l	cpe:2.3:a:siemens:opcenter_rd\&l
siemens	simatic it lms	cpe:2.3:a:siemens:simatic_it_lms
siemens	simatic it production suite	cpe:2.3:a:siemens:simatic_it_production_suite
siemens	simatic notifier server	cpe:2.3:a:siemens:simatic_notifier_server
siemens	simatic pcs neo	cpe:2.3:a:siemens:simatic_pcs_neo
siemens	simatic step 7	cpe:2.3:a:siemens:simatic_step_7
siemens	simocode es	cpe:2.3:a:siemens:simocode_es

and 1 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

siemens opcenter execution discretebefore 3.2
siemens opcenter execution foundationbefore 3.2
siemens opcenter execution processbefore 3.2
siemens opcenter intelligencebefore 3.3
siemens opcenter qualitybefore 11.3
siemens opcenter rd&l8.0
siemens simatic it lmsbefore 2.6
siemens simatic it production suitebefore 8.0
siemens simatic notifier serverall versions
siemens simatic pcs neobefore 3.0
siemens simatic pcs neo3.0
siemens simatic step 715 and later · before 15.1
siemens simatic step 715.1
siemens simatic step 716
siemens simocode esbefore 15.1
siemens simocode es15.1
siemens simocode es16
siemens soft starter esbefore 15.1
siemens soft starter es15.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (siemens). Independent of NVD's CPE analysis and usually ahead of it.

Siemens Opcenter Execution Discrete
- All versions < V3.2affected
Siemens Opcenter Execution Foundation
- All versions < V3.2affected
Siemens Opcenter Execution Process
- All versions < V3.2affected
Siemens Opcenter Intelligence
- All versions < V3.3affected
Siemens Opcenter Quality
- All versions < V11.3affected
Siemens Opcenter RD&L
- V8.0affected
Siemens SIMATIC IT LMS
- All versions < V2.6affected
Siemens SIMATIC IT Production Suite
- All versions < V8.0affected
Siemens SIMATIC Notifier Server for Windows
- All versionsaffected
Siemens SIMATIC PCS neo
- All versions < V3.0 SP1affected
Siemens SIMATIC STEP 7 (TIA Portal) V15
- All versions < V15.1 Update 5affected
Siemens SIMATIC STEP 7 (TIA Portal) V16
- All versions < V16 Update 2affected

Same product

siemens: all records

Other highest-scoring records for the same primary product.

CVE-2020-7581A vulnerability has been identified in Opcenter Execution Discrete (All versions < V3.2), Opcenter Execution Foundation (All versions < V3.2
26Monitor
CVE-2020-7588A vulnerability has been identified in Opcenter Execution Discrete (All versions < V3.2), Opcenter Execution Foundation (All versions < V3.2
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-20-532 · Jul 16, 2020(Siemens Endüstriyel Ürünler Zafiyeti)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: none
Availability: low · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: None
Availability impact: Low

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

nvd-primary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {2  return node.children.map(expand);3}

Fixed

1const MAX_DEPTH = 32;2function expand(node, depth = 0) {3  if (depth > MAX_DEPTH) throw new Error("too deep");4  return node.children.map((c) => expand(c, depth + 1));5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

cert-portal.siemens.com/productcert/pdf/ssa-841348.pdf

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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