SAP NetWeaver Deserialization Vulnerability
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.
- Vendor
- SAP
- Product
- NetWeaver
- CVSS
- 9.1
- EPSS (exploit probability)
- 12.7%
- Status
- kevransomware use
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2025-42999 being exploited?
Yes. CISA added CVE-2025-42999 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild. CISA marks it as known to be used in ransomware campaigns.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 12.7% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-19. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other SAP NetWeaver CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2025-31324 SAP NetWeaver Unrestricted File Upload Vulnerabilityransomware use | [ CRITICAL ] | 10.0 | 99.5% | |
| CVE-2017-12637 SAP NetWeaver Directory Traversal Vulnerability | [ HIGH ] | 7.5 | 95.1% | |
| CVE-2021-38163 SAP NetWeaver Unrestricted File Upload Vulnerability | [ CRITICAL ] | 9.9 | 36.9% | |
| CVE-2016-2388 SAP NetWeaver Information Disclosure Vulnerability | [ MEDIUM ] | 5.3 | 52.2% | |
| CVE-2016-2386 SAP NetWeaver SQL Injection Vulnerability | [ CRITICAL ] | 9.8 | 71.5% | |
| CVE-2020-6287 SAP NetWeaver Missing Authentication for Critical Function Vulnerability | [ CRITICAL ] | 10.0 | 94.7% | |
| CVE-2016-9563 SAP NetWeaver XML External Entity (XXE) Vulnerability | [ MEDIUM ] | 6.5 | 24.2% | |
| CVE-2016-3976 SAP NetWeaver Directory Traversal Vulnerability | [ HIGH ] | 7.5 | 47.3% |