CVE-2016-2388
MEDIUMCVE-2016-2388 is a medium-severity (CVSS 5.3) Information Exposure vulnerability in sap netweaver application server java. It is in CISA's Known Exploited Vulnerabilities catalog (added 2022-06-09) — treat it as actively exploited and patch now. O3 Security detects and blocks CVE-2016-2388 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.
The Universal Worklist Configuration in SAP NetWeaver AS JAVA 7.4 allows remote attackers to obtain sensitive user information via a crafted HTTP request, aka SAP Security Note 2256846.
Exploitation Status
Actively exploited in the wild
- Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2022-06-09. Federal agencies were required to remediate by 2022-06-30.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2016-2388.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2016-2388 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 368,770 CVEs with a current EPSS score, this one falls in the 50–90% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Description
The Universal Worklist Configuration in SAP NetWeaver AS JAVA 7.4 allows remote attackers to obtain sensitive user information via a crafted HTTP request, aka SAP Security Note 2256846.
Affected Products
netweaver application server javasapResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
SAP NetWeaver AS JAVA 7.1 < 7.5 - Information Disclosure
by ERPScan · May 19, 2016
SAP NetWeaver J2EE Engine 7.40 - SQL Injection
by Vahagn Vardanyan · Jan 10, 2018
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every sap netweaver application server java deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for exploitation at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
Remediation status
No patch has shipped for CVE-2016-2388 yet — track the sap netweaver application server java advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2016-2388 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.
Tailored to CVE-2016-2388. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2016-2388 being exploited in your environment?
O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2016-2388 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.