01 Record
CVE-2020-5136
A buffer overflow vulnerability in SonicOS allows an authenticated attacker to cause Denial of Service (DoS) in the SSL-VPN and virtual assist portal, which leads to a firewall crash. This
UnratedPUBLISHEDCNA: sonicwall
CNA base scoreUnratedNo CNA CVSS vector
02 Description
A buffer overflow vulnerability in SonicOS allows an authenticated attacker to cause Denial of Service (DoS) in the SSL-VPN and virtual assist portal, which leads to a firewall crash. This
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.11% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 65.9% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-10-12 10:40Z6 YR AGO
- Last updated
- 2024-08-04 08:22Z2 YR AGO
- Reserved
- 2019-12-31
- Assigning CNA
- sonicwall
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
- Data version
- 5.1
- Document digest
- 2d853d6d8c451807d0fd34522a375fddf9588354c69eff7aec591164417c2008
05 Affected products
VendorProductVersionsPlatforms
SonicWallSonicOSSonicOS 6.5.4.7-79n and earlier, SonicOS 5.9.1.7-2n and earlier, SonicOS 5.9.1.13-5n and earlier, SonicOS 6.5.1.11-4n and earlier, SonicOS 6.0.5.3-93o and earlier, SonicOSv 6.5.4.4-44v-21-794 and earlier, SonicOS 7.0.0.0-1—
06 References
- psirt.global.sonicwall.comhttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0011