CVE-2025-12771

Local code execution via stack buffer overflow

Published Dec 26, 2025 · Updated Dec 26, 2025

Stack-based buffer overflow in IBM Concert 1.0.0 through 2.1.0 allows local users to execute arbitrary code via an unspecified local input. IBM identifies improper bounds checking but does not disclose the affected component, buffer operation, or attacker-controlled input. Exploitation requires low-privileged local access and can compromise the confidentiality, integrity, and availability of the Concert host.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in IBM Concert 1.0.0 through 2.1.0 allows local users to execute arbitrary code via an unspecified local input. IBM identifies improper bounds checking but does not disclose the affected component, buffer operation, or attacker-controlled input. Exploitation requires low-privileged local access and can compromise the confidentiality, integrity, and availability of the Concert host.

The record

CVE
CVE-2025-12771
Published
Dec 26, 2025
Updated
Dec 26, 2025
Vendor
IBM
Product
Concert
Classifications
CWE-119, T1203
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 26, 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?

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  1. Affected versionversion=1.0.0 <=2.1.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

IBM · Concertversion=1.0.0 <=2.1.0

Published CVSS scores

7.8IBM CorporationCVSS:3.1/AV:L/AC:L/PR:L/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.

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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1203Exploitation for Client Execution

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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