CVE-2015-4852
Oracle WebLogic Server Deserialization of Untrusted Data Vulnerability
- Critical 9.8
- Exploited: added to CISA KEV 3 Nov 2021
- A public exploit reference is listed
Description
The WLS Security component in Oracle WebLogic Server 10.3.6.0, 12.1.2.0, 12.1.3.0, and 12.2.1.0 allows remote attackers to execute arbitrary commands via a crafted serialized Java object in T3 protocol traffic to TCP port 7001, related to oracle_common/modules/com.bea.core.apache.commons.collections.jar. NOTE: the scope of this CVE is limited to the WebLogic Server product.
Key facts
- Published
- 18 Nov 2015
- Last changed
- 21 Oct 2025
- Assigned by
- oracle
- KEV added
- 3 Nov 2021
- KEV fix due
- 3 May 2022
- EPSS
- 94.991% likely to be exploited in the next 30 days, higher than 99.863% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a |
|
Timeline
- 18 Nov 2015 Published
- 3 Nov 2021 CVE-2015-4852 added to CISA KEV
- 3 Nov 2021 Added to the CISA KEV catalogue