CVE-2020-3147: cisco cisco small business 300 series managed switches Improper Input Validation
Vulnerability summary
CVE-2020-3147 is a high (CVSS 8.6) Improper Input Validation vulnerability in cisco cisco small business 300 series managed switches. EPSS estimates a 2.28% chance of exploitation in the next 30 days, higher than 82.8% of scored vulnerabilities.
Timeline
- 29-01-2020PublishedVulnerability first disclosed.
- 15-11-2024Last modifiedVulnerability information updated.
Description
A vulnerability in the web UI of Cisco Small Business Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper validation of requests sent to the web interface. An attacker could exploit this vulnerability by sending a malicious request to the web interface of an affected device. A successful exploit could allow the attacker to cause an unexpected reload of the device, resulting in a DoS condition. This vulnerability affects firmware releases prior than 1.3.7.18
CVSS metrics
4 scores · 2 sources · 3 versions- NVDNIST8.6HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS trend
Probability
2.28%
Chance of exploitation in the next 30 days
Percentile
83%
Versus all other CVEs
30-day change
0.00 pp
From 2.28% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Cisco58 products
- cisco small business 300 series managed switches≥ unspecified, < 1.3.7.18
- sf300-08_firmware< 1.3.7.18
- sf300-24_firmware< 1.3.7.18
- sf300-24mp_firmware< 1.3.7.18
- sf300-24p_firmware< 1.3.7.18
1 vendor · 58 products
References
1 links- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smlbus-switch-dos-R6VquS2uVendor AdvisoryX Refsource CISCO