CVE-2021-20494 json
IBM Security Identity Manager Adapters 6.0 and 7.0 are vulnerable to a heap based buffer overflow, caused by improper bounds.
published 2021-06-28 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7912
- cvss
- 6.5
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 66%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- ibm.com/support/pages/node/6465875 advisory
Exploit prediction
1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 6.5 | 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 |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.0 | 6.5 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P |
Affected products
- IBM Security Identity Manager Adapters
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
ibm.com
/support/pages/node/6465875
patch, vendor-advisory
-
exchange.xforce.ibmcloud.com
/vulnerabilities/197882
vdb-entry
Sources
- CVE List CVE-2021-20494
- NVD CVE-2021-20494
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