CriticalCISA KEVExploited in the wildPublic exploit

IBM WebSphere SOAP Deserialization RCE

IdentifiersCVE-2015-7450CWE-502· Deserialization of Untrusted Data

CVE-2015-7450 is a remote code execution vulnerability in serialized-object interfaces exposed by certain IBM products, including IBM WebSphere Application Server. The issue is caused by unsafe deserialization of attacker-controlled Java serialized objects. According to the provided content, exploitation is related to the InvokerTransformer class in the Apache Commons Collections library, a gadget chain commonly used to achieve code execution during Java deserialization. A remote attacker can send a crafted serialized Java object to a vulnerable interface, such as the WebSphere SOAP deserialization attack surface referenced in the content, causing arbitrary commands to be executed on the target system.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows remote execution of arbitrary commands on the affected server. This can enable full compromise of the vulnerable application server, deployment of web shells or malicious WAR files, credential theft, lateral movement, persistence, and use of the server as an initial access point into the broader enterprise environment.

Mitigation

If you can’t patch tonight, do this now.

Until patching is completed, restrict access to vulnerable SOAP or other serialized-object interfaces to trusted administrative networks only, disable or remove unnecessary serialized-object endpoints, and block untrusted traffic to exposed WebSphere administrative or application interfaces. Implement network segmentation, WAF or reverse-proxy filtering where feasible, and monitor for suspicious serialized Java payloads, unexpected command execution, or unauthorized WAR/web shell deployment on affected servers.

Remediation

Patch, then assume compromise.

Apply IBM vendor patches or fixed product versions for all affected IBM products, including WebSphere Application Server and other impacted IBM offerings. Remove or update vulnerable Apache Commons Collections components where applicable, especially versions exposing exploitable deserialization gadget chains involving InvokerTransformer. Review IBM security bulletins for product-specific fixes and ensure all internet-facing serialized-object interfaces are updated.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

International Business MachinesSterling B2b Integratorapplication

International Business MachinesSterling Integratorapplication

International Business MachinesTivoli Common Reportingapplication

International Business MachinesWatson Content Analyticsapplication

International Business MachinesWatson Explorer Analytical Componentsapplication

International Business MachinesWatson Explorer Annotation Administration Consoleapplication

International Business MachinesWebsphere Application Serverapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

4 SOURCESView more in app

mitre attack websiteNews

Mar 20, 2015

Exploit Public-Facing Application, Technique T1190 - Enterprise | MITRE ATT&CK®

A WebSphere Application Server SOAP deserialization vulnerability used by FIN13.

mitre attackNews

Jan 25, 2026

Exploit Public-Facing Application, Technique T1190 - Enterprise | MITRE ATT&CK®

An IBM WebSphere Application Server SOAP deserialization vulnerability used for initial access.

mitre attackNews

Jan 25, 2026

FIN13, Elephant Beetle, Group G1016 | MITRE ATT&CK®

A deserialization flaw in IBM WebSphere Application Server SOAP component leveraged for initial access via a public-facing application.

web archiveNews

May 26, 2026

A deserialization-based remote code execution vulnerability affecting IBM products, including WebSphere-related environments, via crafted serialized Java objects.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence1

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures1

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2015-7450

NVD

nvd.nist.gov/vuln/detail/CVE-2015-7450

MITRE CWE · CWE-502

Deserialization of Untrusted Data

Vendor Advisory

www-01.ibm.com/support/docview.wss?uid=swg21970575

Vendor Advisory

www-01.ibm.com/support/docview.wss?uid=swg21971342

Vendor Advisory

www-01.ibm.com/support/docview.wss?uid=swg21971376

Vendor Advisory

www-01.ibm.com/support/docview.wss?uid=swg21971758

Vendor Advisory

www-01.ibm.com/support/docview.wss?uid=swg21972799

Third Party Advisory

exploit-db.com/exploits/41613

US Government Resource

cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-7450