How severe is CVE-2025-12771?

CVE-2025-12771 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-12771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-12771?

CVE-2025-12771 affects Ibm Concert. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-12771?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-12771 have an EU (EUVD) identifier?

Yes. CVE-2025-12771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205433.

When was CVE-2025-12771 published?

CVE-2025-12771 was published on 2025-12-26 and last updated on 2026-10-06.

CVE-2025-12771

CVE-2025-12771 is a high-severity vulnerability in Ibm Concert with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-205433
Weakness: CWE-119
Affected product: Ibm Concert
Published: 2025-12-26
Last modified: 2026-10-06

Description

IBM Concert 1.0.0 through 2.1.0 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system.

Frequently asked questions

What is CVE-2025-12771?: IBM Concert 1.0.0 through 2.1.0 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system.
How severe is CVE-2025-12771?: CVE-2025-12771 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-12771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-12771?: CVE-2025-12771 affects Ibm Concert. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-12771?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-12771 have an EU (EUVD) identifier?: Yes. CVE-2025-12771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205433.
When was CVE-2025-12771 published?: CVE-2025-12771 was published on 2025-12-26 and last updated on 2026-10-06.

References

https://www.ibm.com/support/pages/node/7255549

Affected products (1)

cpe:2.3:a:ibm:concert:*:*:*:*:*:*:*:*

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