CVE-2026-6718

Local application-file modification via default permissions

Published Sep 23, 2026 · Updated Sep 23, 2026

Incorrect default permissions in IBM Concert 1.0.0 through 3.0.0 allow local users to modify application files without authorization. IBM identifies application-file permissions as the affected locus but does not disclose the paths or permission bits assigned incorrectly. Local filesystem access is required; the reported consequence is unauthorized file modification, with no disclosed read or service-interruption impact.

CVSS severity6.2
Medium
EPSS probability0.10%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in IBM Concert 1.0.0 through 3.0.0 allow local users to modify application files without authorization. IBM identifies application-file permissions as the affected locus but does not disclose the paths or permission bits assigned incorrectly. Local filesystem access is required; the reported consequence is unauthorized file modification, with no disclosed read or service-interruption impact.

The record

CVE
CVE-2026-6718
Published
Sep 23, 2026
Updated
Sep 23, 2026
Vendor
IBM
Product
Concert
Classifications
CWE-276, T1565.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2026Record 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 <=3.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

IBM · Concertversion=1.0.0 <=3.0.0

Published CVSS scores

6.2IBMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

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Your stack

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