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Vulnerability record · CVE-2021-20515 · published 30 April 2021

CVE-2021-20515: Ibm informix dynamic server out-of-bounds write vulnerability

Ibm · Informix Dynamic Server

IBM Informix Dynamic Server 14.10 is vulnerable to a stack based buffer overflow, caused by improper bounds checking. A local privileged user could overflow a buffer and execute arbitrary code on the system or cause a denial of service condition. IBM X-Force ID: 198366.

6.7 CVSS 3.1 Medium EPSS 0.32% · top 77.7% CWE-787 · Out-of-bounds write
6.7CVSS 3.1 base score, v2 4.6
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

IBM Informix Dynamic Server 14.10 is vulnerable to a stack based buffer overflow, caused by improper bounds checking. A local privileged user could overflow a buffer and execute arbitrary code on the system or cause a denial of service condition. IBM X-Force ID: 198366.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://exchange.xforce.ibmcloud.com/vulnerabilities/198366 VDB EntryVendor Advisory
https://www.ibm.com/support/pages/node/6448568 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/198366 VDB EntryVendor Advisory
https://www.ibm.com/support/pages/node/6448568 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2010-4070Ibm informix dynamic server vulnerabilityInteger overflow in librpc.dll in portmap.exe (aka the ISM Portmapper service) in ISM before 2.20.TC1.117 in IBM Informix Dynamic Server (IDS) 7.x be…EPSS 5.1%10.0CVE-2009-2753Ibm informix dynamic server memory buffer overflow vulnerabilityMultiple buffer overflows in the authentication functionality in librpc.dll in the Informix Storage Manager (ISM) Portmapper service (aka portmap.exe…EPSS 11%10.0CVE-2009-2754Ibm informix dynamic server vulnerabilityInteger signedness error in the authentication functionality in librpc.dll in the Informix Storage Manager (ISM) Portmapper service (aka portmap.exe)…EPSS 40%10.0CVE-2008-0949Ibm informix dynamic server vulnerabilityUnspecified vulnerability in IBM Informix Dynamic Server (IDS) 7.x through 11.x allows remote attackers to gain privileges via a malformed connection…EPSS 2.6%10.0CVE-2008-0768Ibm informix dynamic server memory buffer overflow vulnerabilityMultiple stack-based and heap-based buffer overflows in the Windows RPC components for IBM Informix Storage Manager (ISM), as used in Informix Dynami…EPSS 4.5%9.3CVE-2011-1033Ibm informix dynamic server memory buffer overflow vulnerabilityStack-based buffer overflow in oninit in IBM Informix Dynamic Server (IDS) 11.50 allows remote attackers to execute arbitrary code via crafted argume…EPSS 4.8%9.0CVE-2012-4857Ibm informix dynamic server memory buffer overflow vulnerabilityBuffer overflow in IBM Informix 11.50 through 11.50.xC9W2 and 11.70 before 11.70.xC7 allows remote authenticated users to execute arbitrary code via …EPSS 4.6%9.0CVE-2012-3334Ibm informix dynamic server memory buffer overflow vulnerabilityStack-based buffer overflow in IBM Informix Dynamic Server (IDS) 11.50 before 11.50.xC9W2 and 11.70 before 11.70.xC5 allows remote authenticated user…EPSS 3.7%

Source: NIST National Vulnerability Database (record CVE-2021-20515), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.