CVE-2021-20494
IBM Security Identity Manager Adapters 6.0 and 7.0 are vulnerable to a heap based buffer overflow...
IBM Security Identity Manager Adapters 6.0 and 7.0 are vulnerable to a heap based buffer overflow, caused by improper bounds. An authenticared user could overflow the buffer and cause the service to crash. IBM X-Force ID: 197882.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
IBM Security Identity Manager Adapters 6.0 and 7.0 are vulnerable to a heap based buffer overflow, caused by improper bounds. An authenticared user could overflow the buffer and cause the service to crash. IBM X-Force ID: 197882.
- Record
CVE-2021-20494- CVSS 3.0
- 6.5 Medium
CVSS:3.0/I:N/C:N/AC:L/AV:N/UI:N/A:H/PR:L/S:U/E:U/RC:C/RL:O - Updated
- 2026-11-02
EUVDEUVD-2021-7912
IBM Security Identity Manager Adapters 6.0 and 7.0 are vulnerable to a heap based buffer overflow, caused by improper bounds. An authenticared user could overflow the buffer and cause the service to crash. IBM X-Force ID: 197882.
- Record
EUVD-2021-7912- CVSS 3.0
- 6.5 Medium
CVSS:3.0/I:N/C:N/AC:L/AV:N/UI:N/A:H/PR:L/S:U/E:U/RC:C/RL:O - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gwjh-r2ww-fpmp No score
IBM Security Identity Manager Adapters 6.0 and 7.0 are vulnerable to a heap based buffer overflow...
IBM Security Identity Manager Adapters 6.0 and 7.0 are vulnerable to a heap based buffer overflow, caused by improper bounds. An authenticared user could overflow the buffer and cause the service to crash. IBM X-Force ID: 197882.
- Record
GHSA-gwjh-r2ww-fpmp- Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
IBM Security Identity Manager Adapters 6.0 and 7.0 are vulnerable to a heap based buffer overflow, caused by improper bounds. An authenticared user could overflow the buffer and cause the service to crash. IBM X-Force ID: 197882.
- Record
CVE-2021-20494- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 3.0
- 6.5 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:N/I:N/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-20494 is a medium vulnerability (CVSS 6.5) in Ibm Security Identity Manager Adapters, published June 28, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.13%, the 66th percentile. No source names a fixed version.