CVE-2021-20024
Multiple Out-of-Bound read vulnerability in SonicWall Switch when handling LLDP Protocol allows...
Multiple Out-of-Bound read vulnerability in SonicWall Switch when handling LLDP Protocol allows an attacker to cause a system instability or potentially read sensitive information from the memory locations.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Multiple Out-of-Bound read vulnerability in SonicWall Switch when handling LLDP Protocol allows an attacker to cause a system instability or potentially read sensitive information from the memory locations.
- Record
CVE-2021-20024- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H - CVSS 2.0
- 6.8 Medium
AV:A/AC:L/Au:N/C:P/I:N/A:C - Weakness
- CWE-125
- Updated
- 2026-11-02
CVE List No score
Multiple Out-of-Bound read vulnerability in SonicWall Switch when handling LLDP Protocol allows an attacker to cause a system instability or potentially read sensitive information from the memory locations.
- Record
CVE-2021-20024- Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2021-7487 No score
Multiple Out-of-Bound read vulnerability in SonicWall Switch when handling LLDP Protocol allows an attacker to cause a system instability or potentially read sensitive information from the memory locations.
- Record
EUVD-2021-7487- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gp55-8ww8-jfq2 No score
Multiple Out-of-Bound read vulnerability in SonicWall Switch when handling LLDP Protocol allows...
Multiple Out-of-Bound read vulnerability in SonicWall Switch when handling LLDP Protocol allows an attacker to cause a system instability or potentially read sensitive information from the memory locations.
- Record
GHSA-gp55-8ww8-jfq2- Weakness
- CWE-125
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-20024 is a high vulnerability (CVSS 8.1) in Sonicwall Switch, published July 9, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.64%, the 50th percentile. No source names a fixed version.