Out-of-bounds write in IBM Informix Dynamic Server
Priority LOW 30CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.00317 24th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| IBM | Informix Dynamic Server | 14.1 | — | No fix listed | CNA |
- Informix Dynamic Server VendorIBM Affected 14.1 Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ibm:informix_dynamic_server:14.10:*:*:*:*:*:*:* | 14.10 | Vulnerable | IBM |
| cpe:2.3:o:hp:hp-ux:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Hewlett Packard Enterprise |
| cpe:2.3:o:ibm:aix:-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Linux |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
| cpe:2.3:o:oracle:solaris:-:*:*:*:*:*:-:* | not specified by NVD | Running on | Oracle |
- cpe:2.3:a:ibm:informix_dynamic_server:14.10:*:*:*:*:*:*:* Versions 14.10 Vulnerable ·IBM
- cpe:2.3:o:hp:hp-ux:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Hewlett Packard Enterprise
- cpe:2.3:o:ibm:aix:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
- cpe:2.3:o:oracle:solaris:-:*:*:*:*:*:-:* Versions not specified by NVD Running on ·Oracle
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20515
- 2026-10-03 Alias added: GHSA-hvxp-j45w-m4cw
References
More IBM Informix Dynamic Server vulnerabilities
- TI-2009-02627 Integer signedness error in the authentication functionality in librpc.dll in the… CVSS 2.0HIGH 10.0
- TI-2009-02626 Multiple buffer overflows in the authentication functionality in librpc.dll in the… CVSS 2.0HIGH 10.0
- TI-2010-03848 Integer overflow in librpc.dll in portmap.exe (aka the ISM Portmapper service) in ISM… CVSS 2.0HIGH 10.0
- TI-2008-00734 Multiple stack-based and heap-based buffer overflows in the Windows RPC components for… CVSS 2.0HIGH 10.0
- TI-2011-00892 Stack-based buffer overflow in oninit in IBM Informix Dynamic Server (IDS) 11.50 allows… CVSS 2.0HIGH 9.3
- TI-2008-00912 Unspecified vulnerability in IBM Informix Dynamic Server (IDS) 7.x through 11.x allows… CVSS 2.0HIGH 10.0
Sources
- CVE-2021-20515 · CVE Program
- CVE-2021-20515 · NVD
- FIRST EPSS
- GHSA-hvxp-j45w-m4cw · GitHub Advisory Database · CC BY 4.0
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