CVE-2025-36099Network attack vector

Service interruption via unbounded request memory allocation

Published Sep 29, 2025 · Updated Sep 29, 2025

Denial of service in IBM WebSphere Application Server 8.5 and 9.0 allows remote authenticated users to exhaust server memory. A specially crafted request triggers resource allocation without limits or throttling; IBM has not disclosed the affected request handler or allocation path. The request requires a privileged account and can interrupt service through memory exhaustion, with no reported confidentiality or integrity impact.

CVSS severity4.9
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in IBM WebSphere Application Server 8.5 and 9.0 allows remote authenticated users to exhaust server memory. A specially crafted request triggers resource allocation without limits or throttling; IBM has not disclosed the affected request handler or allocation path. The request requires a privileged account and can interrupt service through memory exhaustion, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2025-36099
Published
Sep 29, 2025
Updated
Sep 29, 2025
Vendor
IBM
Product
IBM WebSphere Application Server
Classifications
CWE-770, T1499
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 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=8.5
  2. Affected versionversion=9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

IBM · IBM WebSphere Application Serverversion=8.5; version=9.0

Published CVSS scores

4.9IBMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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