CVE-2025-42928
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedUnder certain conditions, a high privileged user could exploit a deserialization vulnerability in SAP jConnect to launch remote code execution. The system may be vulnerable when specially crafted input is used to exploit the vulnerability resulting in high impact on confidentiality, integrity and availability of the system.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceSAP jConnect contains a deserialization vulnerability that allows a high-privileged authenticated user to execute arbitrary code by providing specially crafted input. The flaw affects the deserialization of untrusted data, enabling remote code execution with the privileges of the affected service.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify SAP jConnect installationLocate the jConnect jar files in the application server's lib directory, typically under SAP NetWeaver or SAP Java AS installations. Common paths include $SAP_HOME$/j2ee/cluster/ etc. Check for jconn4.jar or similar jConnect driver files.Affected if SAP jConnect driver is present on the system
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Determine jConnect versionInspect the manifest file within the jConnect jar or run: jar -xf jconn4.jar META-INF/MANIFEST.MF && cat META-INF/MANIFEST.MF. Also check file properties of the jconn4.jar file.Affected if Installed version cannot be confirmed as patched or falls outside known secure version ranges
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Verify deserialization configurationReview application configuration files (like ser-config.xml, deployment descriptors) and Java deserialization settings in the SAP J2EE/Java AS admin console. Check if custom deserializers or object inputs are configured to accept untrusted data.Affected if Deserialization of untrusted data is permitted without strict whitelisting or validation
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Audit high-privileged user accessReview SAP user management and role assignments. Check which users have high-privileged roles (like SAP_ADMIN, J2EE_ADMIN) that could leverage this vulnerability. Query table USR02 and check roles via transaction SUIM.Affected if Multiple high-privileged authenticated users exist or high-privileged access is not restricted to specific IPs/admin stations
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Inspect network exposureCheck if the SAP Java instance ports (typically 5xx00 range for HTTP, 5xx01 for HTTPS) are exposed beyond the internal network. Review SAP Logon Pad connections and firewall rules.Affected if SAP Java services are reachable from untrusted networks or DMZ segments
The environment is affected if SAP jConnect is installed with a version that has not been patched, deserialization of untrusted data is enabled, and high-privileged authenticated users can access the vulnerable service.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply the relevant SAP security patch for jConnect and review deserialization configurations to ensure only trusted data sources are processed. Consider network segmentation to limit high-privileged access.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-42928 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-42928 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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