What is CVE-2025-42999?

CVE-2025-42999 is a critical-severity vulnerability in SAP Netweaver, classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2025-05-13.

How severe is CVE-2025-42999?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2025-42999 known to be exploited?

Yes. CVE-2025-42999 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-05-15), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.

Deserialization in SAP Netweaver

CVE-2025-42999

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.

Vulnerability class: Insecure Deserialization

Published 2025-05-13 · last modified 2026-08-11.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.127 (96.2th percentile), scored 2026-10-18.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.139 · newest: 0.127 · change: -0.011

Affected products

SAP Netweaver — versions 7.5
SAP Se Netweaver (Visual Composer Development Server) — versions VCFRAMEWORK 7.50

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2025-05-15. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 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.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

me.sap.com/notes/3604119 (Permissions Required)
url.sap/sapsecuritypatchday (Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Exploit, Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2025-42999?: CVE-2025-42999 is a critical-severity vulnerability in SAP Netweaver, classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2025-05-13.
How severe is CVE-2025-42999?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2025-42999 known to be exploited?: Yes. CVE-2025-42999 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-05-15), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.