8.6

CVE-2020-3191: cisco adaptive_security_appliance_software Improper Input Validation

CVSS: 8.6v3.0HighModified
Published 06-05-2020Last modified 15-11-2024
Open JSON

Vulnerability summary

CVE-2020-3191 is a high (CVSS 8.6) Improper Input Validation vulnerability in cisco adaptive_security_appliance_software. EPSS estimates a 1.88% chance of exploitation in the next 30 days, higher than 79.1% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.0 (CVE.org)
EPSS score
1.88%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-05-2020
    PublishedVulnerability first disclosed.
  2. 15-11-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in DNS over IPv6 packet processing for Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to unexpectedly reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper length validation of a field in an IPv6 DNS packet. An attacker could exploit this vulnerability by sending a crafted DNS query over IPv6, which traverses the affected device. An exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. This vulnerability is specific to DNS over IPv6 traffic only.

CVSS metrics

4 scores · 2 sources · 3 versions

EPSS trend

Probability

1.88%

Chance of exploitation in the next 30 days

Percentile

79%

Versus all other CVEs

30-day change

+0.06 pp

From 1.82% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.88%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco15 products

1 vendor · 15 products

References

1 links