8.6

CVE-2020-3563: cisco cisco firepower threat defense software Uncontrolled Resource Consumption

CVSS: 8.6v3.0HighModified
Published 21-10-2020Last modified 13-11-2024
Open JSON

Vulnerability summary

CVE-2020-3563 is a high (CVSS 8.6) Uncontrolled Resource Consumption vulnerability in cisco cisco firepower threat defense software. EPSS estimates a 1.43% chance of exploitation in the next 30 days, higher than 72.5% 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
1.43%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-10-2020
    PublishedVulnerability first disclosed.
  2. 13-11-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in the packet processing functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to inefficient memory management. An attacker could exploit this vulnerability by sending a large number of TCP packets to a specific port on an affected device. A successful exploit could allow the attacker to exhaust system memory, which could cause the device to reload unexpectedly. No manual intervention is needed to recover the device after it has reloaded.

CVSS metrics

4 scores · 2 sources · 3 versions

EPSS trend

Probability

1.43%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

+0.01 pp

From 1.42% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.43%

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

Cisco2 products

1 vendor · 2 products

References

1 links