CVE-2021-20024: sonicwall sonicwall switch Out-of-bounds Read
CVSS: 8.1v3.1HighModified
Published 09-07-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-20024 is a high (CVSS 8.1) Out-of-bounds Read vulnerability in sonicwall sonicwall switch. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.4% of scored vulnerabilities.
CVSS score
8.1/10
010
High · v3.1 (NVD)EPSS score
0.64%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 09-07-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 8.1Preferred score · NVD (NIST)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HSourcesSingle source
Medium 6.8Preferred score · NVD (NIST)
AV:A/AC:L/Au:N/C:P/I:N/A:CSourcesSingle source
EPSS trend
Probability
0.64%
Chance of exploitation in the next 30 days
Percentile
49%
Versus all other CVEs
30-day change
0.00 pp
From 0.64% on 18-09-2026
18-09-202618-10-2026
EPSS score0.64%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Sonicwall2 products
- sonicwall switch1.0.0.5-16 and earlier
- switch≤ 1.0.0.5-16
1 vendor · 2 products