Missing Authentication check in SAP NetWeaver (Message Server) (CVE-2026-58240) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-58240

Missing Authentication check in SAP NetWeaver (Message Server)

Answer in brief

CVE-2026-58240 records a Unknown severity vulnerability in Missing Authentication check in SAP NetWeaver (Message Server). The current sources do not mark it as known exploited. The current feed maps SAP_SE/SAP NetWeaver (Message Server) (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 8, 2026Updated Sep 8, 2026Source checked Sep 8, 2026First seen by HOL Sep 8, 2026Material review Sep 8, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps SAP_SE/SAP NetWeaver (Message Server) (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
SAP_SE/SAP NetWeaver (Message Server)generic	KERNEL 9.16 \|\| 9.18 \|\| 9.19 \|\| 9.20	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for SAP_SE/SAP NetWeaver (Message Server).
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 8, 2026

Sources and claim methodology

Upstream source description

SAP NetWeaver Message Server does not sufficiently validate the authenticity of internal application server components during registration. An unauthenticated attacker with network access to the affected service could exploit this weakness to register an unauthorized component and potentially perform unauthorized actions within the application environment, resulting in a high impact on the confidentiality, integrity, and availability of the affected system.

Quoted source text, attributed separately from HOL analysis.