CVE-2023-32336

Unauthenticated code execution via unfiltered RMI deserialization

Published May 22, 2023 · Updated Jan 27, 2025

Insecure deserialization in IBM InfoSphere Information Server 11.7 allows remote attackers to execute arbitrary code through an RMI service. The Agent and ReportServerRMIWrapper registries accept serialized objects without restrictive class filters, enabling attacker-controlled object graphs. Exploitation requires adjacent-network access to an RMI service but requires no authentication or user interaction.

CVSS severity8.8
High
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure deserialization in IBM InfoSphere Information Server 11.7 allows remote attackers to execute arbitrary code through an RMI service. The Agent and ReportServerRMIWrapper registries accept serialized objects without restrictive class filters, enabling attacker-controlled object graphs. Exploitation requires adjacent-network access to an RMI service but requires no authentication or user interaction.

The record

CVE
CVE-2023-32336
Published
May 22, 2023
Updated
Jan 27, 2025
Vendor
IBM
Product
InfoSphere Information Server
Classifications
CWE-502, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.7

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

IBM · InfoSphere Information Serverversion=11.7

Published CVSS scores

8.8IBM CorporationCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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