What is CVE-2025-1991?

CVE-2025-1991 is a high-severity vulnerability in Ibm Informix Dynamic Server, classified under Integer Underflow. CVSS score: 7.5/10. Published 2025-06-28.

How severe is CVE-2025-1991?

High severity. CVSS v3 base score is 7.5 out of 10.

Integer overflow in Ibm Informix Dynamic Server

CVE-2025-1991

IBM Informix Dynamic Server 12.10,14.10, and15.0 could allow a remote attacker to cause a denial of service due to an integer underflow when processing packets.

EPSS: 0.004 (30.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Ibm Informix Dynamic Server — versions 12.10, 14.10, 15.0
Ibm Informix_dynamic_server — versions 12.10, 14.10, 15.0

Weakness classification (CWE)

CWE-191 — Integer Underflow

References

psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-1991?: CVE-2025-1991 is a high-severity vulnerability in Ibm Informix Dynamic Server, classified under Integer Underflow. CVSS score: 7.5/10. Published 2025-06-28.
How severe is CVE-2025-1991?: High severity. CVSS v3 base score is 7.5 out of 10.