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

Exp

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.

Published: 2025-05-13 Last update: 2025-10-31 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-42999 is rated Critical Active Threat (90.5/100): CVSS Critical severity, with high exploitation likelihood (EPSS 38.57%, 97th percentile). CISA KEV confirms active exploitation (added 2025-05-15) affecting SAP / NetWeaver. a weakness (CWE-502) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

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

CISA KEV Record for CVE-2025-42999

Name: SAP NetWeaver Deserialization Vulnerability · CISA KEV detail

Exploit added: 2025-05-15

Action due: 2025-06-05

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Public exploit references (Exploit-DB) for CVE-2025-42999

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2025-42999

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 2026-06-03 66.35% 38.57% -27.78%
2 2026-05-25 52.07% 66.35% +14.28%
3 2026-05-22 — 52.07% —

Full EPSS history (35 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-42999

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
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.
 2.3 6.0 [email protected]

Weakness enumeration for CVE-2025-42999

Affected software / configurations for CVE-2025-42999

Vendor Product Version Raw CPE
sap netweaver 7.5 cpe:2.3:a:sap:netweaver:7.5:*:*:*:*:*:*:*

References for CVE-2025-42999

cvelogic Threat Intelligence