Insecure Deserialization in SAP NetWeaver (Visual Composer development server) (CVE-2025-42999) | HOL Guard CVE

High · CVSS 9.1Known ExploitedCVE-2025-42999

Insecure Deserialization in SAP NetWeaver (Visual Composer development server)

Answer in brief

CVE-2025-42999 records a High severity (CVSS 9.1) vulnerability in Insecure Deserialization in SAP NetWeaver (Visual Composer development server). The current sources mark it as known exploited. The current feed maps SAP_SE/SAP NetWeaver (Visual Composer development 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 May 13, 2025Updated Aug 11, 2026Source checked Sep 21, 2026First seen by HOL May 24, 2026Material review Aug 11, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 9.1
Exploitation: Known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 9.1. Known-exploitation status makes exposure review time-sensitive. 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 (Visual Composer development server) (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:sap:netweaver:7.5:::::::*	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
SAP_SE/SAP NetWeaver (Visual Composer development server)generic	VCFRAMEWORK 7.50	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for SAP_SE/SAP NetWeaver (Visual Composer development 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
May 13, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
May 24, 2026
Added to CISA KEV
May 15, 2025
Evidence: source:kev:kev:kev:record

Sources and claim methodology

Upstream source description

SAP NetWeaver Visual Composer Metadata Uploader is vulnerable when a privileged user can upload untrusted or malicious content which, when deserialized, could potentially lead to a compromise of confidentiality, integrity, and availability of the host system.

Quoted source text, attributed separately from HOL analysis.