CVE-2025-33090Network attack vector

Service interruption via inefficient regular expression processing

Published Aug 18, 2025 · Updated Aug 18, 2025

Inefficient regular expression processing in IBM Concert Software 1.0.0 through 1.1.0 allows remote attackers to interrupt service. An undisclosed Concert input-processing locus evaluates a specially crafted regular expression with excessive computational resource consumption. No authentication or user interaction is required, and processing can exhaust service resources; IBM has not identified the request field or endpoint.

CVSS severity7.5
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Inefficient regular expression processing in IBM Concert Software 1.0.0 through 1.1.0 allows remote attackers to interrupt service. An undisclosed Concert input-processing locus evaluates a specially crafted regular expression with excessive computational resource consumption. No authentication or user interaction is required, and processing can exhaust service resources; IBM has not identified the request field or endpoint.

The record

CVE
CVE-2025-33090
Published
Aug 18, 2025
Updated
Aug 18, 2025
Vendor
IBM
Product
IBM Concert
Classifications
CWE-1333, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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=1.0.0 <=1.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Concertversion=1.0.0 <=1.1.0

Published CVSS scores

7.5IBM CorporationCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1333Inefficient Regular Expression Complexity
T1499.004Application or System Exploitation

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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