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CVE-2026-15266VulnerabilityPublished

IBM Concert 1.0 through 3.0.1.1 contains components that allow potentially unsafe command execution, which could be

Source GCVE Database

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Authoritative record:CVE-2026-15266· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical.

Data as of 8 Nov 2026, 20:35 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (ibm)CVSS 3.19.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
IBMConcertAffected
  • >=1.0 <=3.0.1.1
Fixed in–

AI-suggested

Until an official fix is available, restrict network access to the affected IBM Concert versions and monitor for suspicious activity related to command execution attempts.

Description

IBM Concert versions 1.0 through 3.0.1.1 contain components that allow potentially unsafe command execution. This vulnerability could be exploited to execute arbitrary system commands on the host, leading to full compromise. The flaw is identified as CWE-78 and has a critical CVSS score of 9.8.

References

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