CVE-2015-4852
CriticalExploitedPublic exploitThe 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…
Published Feb 23, 2021 · Updated Aug 26, 2026 · Also known as UBUNTU-CVE-2015-4852, USN-6936-1
Key Facts
Patch immediately- CVE-2015-4852 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Storagetek Tape Analytics Sw Tool (Oracle), Virtual Desktop Infrastructure (Oracle), Weblogic Server (Oracle) and 6 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 20, 2020. Public exploit code is available.
- EPSS estimates a 95% probability of exploitation in the next 30 days.
- Fixed versions are available, including apache-commons-beanutils 1.11.0-7.3.1, apache-commons-beanutils 1.9.4-3.7, apache-commons-beanutils-javadoc 1.11.0-7.3.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
95%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2015-4852 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| Industry KEV feed | Oct 20, 2020 | May 3, 2022 | Not reported |
| CIRCL KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| ENISA EUVD | Nov 3, 2021 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
20 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Storagetek Tape Analytics Sw ToolOracle | 2.3 | n/a |
| Virtual Desktop InfrastructureOracle | See advisory | 3.5.2 |
| Weblogic ServerOracle | 10.3.6.0.0, 12.1.2.0.0, 12.1.3.0.0, 12.2.1.0.0 | n/a |
| libcommons-collections3-javaubuntu | See advisory | 3.2.1-6ubuntu0.1~esm1 |
| openjdk-8ubuntu | See advisory | n/a |
Patched Releases
apache-commons-beanutils
1.11.0-7.3.1, 1.9.4-3.7
apache-commons-beanutils-javadoc
1.11.0-7.3.1, 1.9.4-3.7
apache-commons-validator
1.10.1-1.1
apache-commons-validator-javadoc
1.10.1-1.1
libcommons-collections3-java
3.2.1-6ubuntu0.1~esm1
Virtual Desktop Infrastructure
3.5.2
Timeline
Added to Industry KEV feed
Oct 20, 2020
Publicly disclosed
Feb 23, 2021
Added to CISA KEV
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Aug 26, 2026
Weakness Type
- CWE-502 Deserialization of Untrusted Data
References
- advisoryhttps://access.redhat.com/solutions/2045023
- advisoryhttps://blogs.apache.org/foundation/entry/apache_commons_statement_to_widespread
- advisoryhttps://issues.apache.org/jira/browse/COLLECTIONS-580
- advisoryhttps://ubuntu.com/security/CVE-2015-4852
- advisoryhttps://ubuntu.com/security/notices/USN-6936-1
FAQ
Common Questions.
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.
Affected: Storagetek Tape Analytics Sw Tool (Oracle) versions 2.3; Virtual Desktop Infrastructure (Oracle); Weblogic Server (Oracle) versions 10.3.6.0.0, 12.1.2.0.0, 12.1.3.0.0, 12.2.1.0.0, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 20, 2020.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.
Public exploit code is available.
Fixed versions are available, including apache-commons-beanutils 1.11.0-7.3.1, apache-commons-beanutils 1.9.4-3.7, apache-commons-beanutils-javadoc 1.11.0-7.3.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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