ExploitedIn CISA KEVFix available

CVE-2015-4852

Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · kevintel.

Published2015-11-18
WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2015-11-1815:59CVE publishedNVD
2021-11-03Listed as exploited by GCVEGCVE
2021-11-03Exploitation first reportedCISA KEV
2021-11-03Added to the CISA KEV catalogCISA KEV
2025-02-0418:47SSVC exploitation set to activeCISA-ADP
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-4852?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-4852?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Oracle weblogic server

Branch	Affected	Fixed in	Source
10.3	= 10.3.6.0.0	no fix published	NVD
12.1	= 12.1.2.0.0	no fix published	NVD
12.1	= 12.1.3.0.0	no fix published	NVD
12.2	= 12.2.1.0.0	no fix published	NVD

Oracle storagetek tape analytics sw tool

Branch	Affected	Fixed in	Source
2.3	= 2.3	no fix published	NVD

Oracle virtual desktop infrastructure

Branch	Affected	Fixed in	Source
3.5	≤ 3.5.2	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

CISA’s required action: Apply updates per vendor instructions.due 2022-05-03

Advisories and patches

www.oracle.comPatch
www.oracle.comPatch · Vendor Advisory
www.oracle.comPatch · Vendor Advisory
www.oracle.comPatch · Vendor Advisory
www.oracle.comVendor Advisory
www.oracle.comPatch · Vendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 4 repositories, unverifiedroo7break/serialatorAndersonSingh/serialization-vulnerability-scannerzhzhdoai/Weblogic_Vulnnex1less/CVE-2015-4852

CISA Known Exploited Vulnerability

Date Added: 2021-11-03
Patch Due Date: 2022-05-03
Ransomware Use: Unknown
Required Action: Apply updates per vendor instructions.

Sources

CISA KEVKEV entry2021-11-03
GCVEexploitation2021-11-03
CISA-ADPSSVC decisionactive2025-02-04
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.19.82025-02-04
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CISA-ADPweakness (CWE)CWE-5022025-02-04
NVDweakness (CWE)CWE-502read 2026-10-23
FIRST EPSSEPSS score95.0 %read 2026-10-23
PoC-in-GitHubproof of concept4read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2015-11-18
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2015-4852?

Is CVE-2015-4852 actively exploited?

Yes. CVE-2015-4852 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-03.

What is the CVSS score for CVE-2015-4852?

CVE-2015-4852 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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