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Full vulnerability report · 2021
CVE-2002-20001High confidence

n/a — Uncontrolled Resource Consumption

n/a · n/a

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
SSA-506569 · CSAF 2.0 · revision 2 · finalSiemens ProductCERTSSA-506569: Multiple Vulnerabilities in SCALANCE W1750D
3 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SCALANCE W1750D (JP) (6GK5750-2HX01-1AD0)
  • SCALANCE W1750D (ROW) (6GK5750-2HX01-1AA0)
  • SCALANCE W1750D (USA) (6GK5750-2HX01-1AB0)
Summary
The Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side) to send arbitrary numbers that are actually not public keys, and trigger expensive server-side DHE modular-exponentiation calculations, aka a D(HE)ater attack. The client needs very little CPU resources and network bandwidth. The attack may be more disruptive in cases where a client can require a server to select its largest supported key size. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE. (ATLWL-266)
Remediation
Update to V8.7.1.11 or later version
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2002-1979

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

The Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side) to send arbitrary numbers that are actually not public keys, and trigger expensive server-side DHE modular-exponentiation calculations, aka a D(HE)at or D(HE)ater attack. The client needs very little CPU resources and network bandwidth. The attack may be more disruptive in cases where a client can require a server to select its largest supported key size. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE.

What

The Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side) to send arbitrary numbers that are actually not public keys, and trigger expensive server-side DHE modular-exponentiation calculations, aka a D(HE)at or D(HE)ater attack. The client needs very little CPU resources and network bandwidth. The attack may be more disruptive in cases where a client can require a server to select its largest supported key size. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE.

Why

The product does not properly control the allocation and maintenance of a limited resource.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

The Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side) to send arbitrary numbers that are actually not public keys, and trigger expensive server-side DHE modular-exponentiation calculations, aka a D(HE)at or D(HE)ater attack. The client needs very little CPU resources and network bandwidth. The attack may be more disruptive in cases where a client can require a server to select its largest supported key size. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE.

Why

The product does not properly control the allocation and maintenance of a limited resource.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Uncontrolled Resource Consumption → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-400 ↗

CWE-400: Uncontrolled Resource Consumption. The product does not properly control the allocation and maintenance of a limited resource.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-400Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2023-1886Sophos Unified Threat Management (UTM) Software: Mehrere Schwachstellen

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Sophos Unified Threat Management (UTM) Software ausnutzen, um beliebigen Programmcode auszuführen oder einen Denial of Service Zustand herbeizuführen.

Official advisory
BSI · German · WID-SEC-W-2022-2251Aruba ClearPass Policy Manager: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Aruba ClearPass Policy Manager ausnutzen, um SQL Injection- und Cross Site Scripting Angriffe durchzuführen, Code zur Ausführung zu bringen, seine Rechte zu erweitern oder Informationen offenzulegen.

Official advisory
BSI · German · WID-SEC-W-2024-3056Diffie-Hellman Implementierungen: Mehrere Schwachstellen ermöglichen Denial of Service

Ein entfernter anonymer Angreifer kann mehrere Schwachstellen in verschiedenen Diffie-Hellman Implementierungen ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen.

Official advisory
BSI · German · WID-SEC-W-2023-1352TLS Implementierungen: Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in verschiedenen TLS Implementierungen ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0470Vulnérabilité dans les produits Moxa

Une vulnérabilité a été découverte dans les produits Moxa. Elle permet à un attaquant de provoquer un déni de service à distance.

Official advisory
CERT-FR · French · CERTFR-2022-AVI-862Multiples vulnérabilités dans Aruba Access Points

De multiples vulnérabilités ont été découvertes dans Aruba Access Points. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et un contournement de la politique de sécurité.

Official advisory
CERT-FR · French · CERTFR-2022-AVI-171Multiples vulnérabilités dans les commutateurs Aruba AOS-CX

De multiples vulnérabilités ont été découvertes dans les commutateurs Aruba AOS-CX. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à la confidentialité des données.

Official advisory
CERT-FR · French · CERTFR-2022-AVI-1080Multiples vulnérabilités dans Aruba ClearPass Policy Manager

De multiples vulnérabilités ont été découvertes dans Aruba ClearPass Policy Manager. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à l'intégrité des données.

Official advisory
CERT-FR · French · CERTFR-2022-AVI-1001Multiples vulnérabilités dans les produits Siemens

om/productcert/html/ssa-506569.html Bulletin de sécurité Siemens 568428 du 8 novembre 2022 https://cert-portal.siemens.com/productcert/html/ssa-568428.html Bulletin de sécurité Siemens 570294 du 8 novembre 2022 https://cert-portal.siemens.com/productcert/html/ssa-570294.html Bulletin de sécurité Siemens 587547 du 8 novembre 2022 https://cert-portal.siemens.com/productcert/html/ssa-587547.html Bulletin de sécurité Siemens 787941 du 8 novembre 2022 https://cert-portal.siemens.com/productcert/html/ssa-787941.html Bulletin de sécurité Siemens 853037 du 8 novembre 2022 https://cert-portal.siemens.com/productcert/html/ssa-853037.html Référence CVE CVE-2002-20001 https://www.cve.org/CVERecord?id=CVE-2002-20001 Référence CVE CVE-2021-42550 https://www.cve.org/CVERecord?id=CVE-2021-42550 Référence CVE CVE-2022-30694 https://www.cve.org/CVERecord?id=CVE-2022-30694 Référence CVE CVE-2022-37885 https://www.cve.org/CVERecord?id=CVE-2022-37885 Référence CVE CVE-2022-37886 https://www.cve.org/CVERecord?id=CVE-2022-37886 Référence CVE CVE-2022-37887 https://www.cve.org/CVERecord?id=CVE-2022-37887 Référence CVE CVE-2022-37888 https://www.cve.org/CVERecord?id=CVE-2022-37888 Référence CVE CVE-2022-37889 https://www.cve.org/CVERecord?id=CVE-2022-37889 Référence CVE CVE-2022-37890 https://www.cve.org/CVERecord?id=

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
SCALANCE W1750D (JP) (6GK5750-2HX01-1AD0); SCALANCE W1750D (ROW) (6GK5750-2HX01-1AA0); SCALANCE W1750D (USA) (6GK5750-2HX01-1AB0)
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
Update to V8.7.1.11 or later version
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 11 Nov 2021 · Last source change 13 Feb 2025, 16:27 UTC · CWE-400 · Uncontrolled Resource Consumption

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2002-1979
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceNIST NVD
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2002-1979↗Vendor CSAF · Siemens ProductCERT↗CVE authority or vendor reference↗Public exploit reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2002-20001 · cve.blacktree.nl