CVE-2025-42999 (GCVE-0-2025-42999)

Vulnerability from cvelistv5 – Published: 2025-05-13 00:17 – Updated: 2026-08-11 03:55
VLAI CISA Previdian
Title
Insecure Deserialization in SAP NetWeaver (Visual Composer development server)
Summary
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.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-12 00:00 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: f482fc46-d95b-44ed-855c-9b8fe4f5a0ce

Vulnerability ID: CVE-2025-42999

Status: Confirmed

Status Updated: 2025-05-15 02:00 CEST

Exploited: Yes

Timestamps
First Seen: 2025-05-15
Asserted: 2025-05-15
Scope
Notes: SAP NetWeaver Deserialization Vulnerability | Affected: SAP / NetWeaver | Description: SAP NetWeaver Visual Composer Metadata Uploader contains a deserialization vulnerability that allows a privileged attacker to compromise the confidentiality, integrity, and availability of the host system by deserializing untrusted or malicious content. | 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. | Due date: 2025-06-05 | Known ransomware campaign use (KEV): Known | Notes (KEV): SAP users must have an account to log in and access the patch: https://me.sap.com/notes/3604119 ; https://nvd.nist.gov/vuln/detail/CVE-2025-42999
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-502
Feed CISA Known Exploited Vulnerabilities Catalog
Product NetWeaver
Due Date 2025-06-05
Date Added 2025-05-15
Vendorproject SAP
Vulnerabilityname SAP NetWeaver Deserialization Vulnerability
Knownransomwarecampaignuse Known
References
Created: 2026-10-02 08:09 CEST | Updated: 2026-10-02 08:09 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 74abc1ab-1c52-4cf8-b6f2-2daea1d291a8

Vulnerability ID: CVE-2025-42999

Status: Confirmed

Status Updated: 2026-06-01 12:37 CEST

Exploited: Yes

Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01
Scope
Notes: Insecure Deserialization in SAP NetWeaver (Visual Composer development server) | Affected: SAP_SE / SAP NetWeaver (Visual Composer development server) | CVSS: 9.1 (CRITICAL) | EPSS: 0.13868 | Used in malware: unknown | Listed 1 day ahead of CISA KEV | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Insecure Deserialization in SAP NetWeaver (Visual Composer development server)
Cve Id CVE-2025-42999
Vendor SAP_SE
Ghsa Id None
Product SAP NetWeaver (Visual Composer development server)
Added Date 2026-06-01T10:37:52.113Z
Cvss Score 9.1
Epss Score 0.13868
Previous Ids
Cvss Severity CRITICAL
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.96418
Used In Malware unknown
Vulnerability Id CVE-2025-42999
Ahead Of Cisa Kev 
{
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  "unit": "day"
}
Not Yet In Cisa Kev False
References
Created: 2026-10-02 09:10 CEST | Updated: 2026-10-02 09:10 CEST
Show details on NVD website
To clipboard 

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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.