CVE-2021-20491
IBM Spectrum Protect Server 7.1 and 8.1 is subject to a stack-based buffer overflow caused by...
IBM Spectrum Protect Server 7.1 and 8.1 is subject to a stack-based buffer overflow caused by improper bounds checking during the parsing of commands. By issuing such a command with an improper parameter, an authorized administrator could overflow a buffer and cause the server to crash. IBM X-Force ID: 197792.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- 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 Spectrum Protect Server 7.1 and 8.1 is subject to a stack-based buffer overflow caused by improper bounds checking during the parsing of commands. By issuing such a command with an improper parameter, an authorized administrator could overflow a buffer and cause the server to crash. IBM X-Force ID: 197792.
- Record
CVE-2021-20491- CVSS 3.0
- 4.4 Medium
CVSS:3.0/I:N/A:H/UI:N/C:N/S:U/AV:L/AC:L/PR:H/RL:O/E:U/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-7909
IBM Spectrum Protect Server 7.1 and 8.1 is subject to a stack-based buffer overflow caused by improper bounds checking during the parsing of commands. By issuing such a command with an improper parameter, an authorized administrator could overflow a buffer and cause the server to crash. IBM X-Force ID: 197792.
- Record
EUVD-2021-7909- CVSS 3.0
- 4.4 Medium
CVSS:3.0/I:N/A:H/UI:N/C:N/S:U/AV:L/AC:L/PR:H/RL:O/E:U/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-77mx-2f97-rf4c No score
IBM Spectrum Protect Server 7.1 and 8.1 is subject to a stack-based buffer overflow caused by...
IBM Spectrum Protect Server 7.1 and 8.1 is subject to a stack-based buffer overflow caused by improper bounds checking during the parsing of commands. By issuing such a command with an improper parameter, an authorized administrator could overflow a buffer and cause the server to crash. IBM X-Force ID: 197792.
- Record
GHSA-77mx-2f97-rf4c- Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
IBM Spectrum Protect Server 7.1 and 8.1 is subject to a stack-based buffer overflow caused by improper bounds checking during the parsing of commands. By issuing such a command with an improper parameter, an authorized administrator could overflow a buffer and cause the server to crash. IBM X-Force ID: 197792.
- Record
CVE-2021-20491- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H - CVSS 3.0
- 4.4 Medium
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/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-2021-20491 is a medium vulnerability (CVSS 4.4) in Ibm Spectrum Protect Server, published April 16, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. No source names a fixed version.