5.3

CVE-2025-20219: cisco cisco adaptive security appliance (asa) software Improper Access Control

CVSS: 5.3v3.1MediumDeferred
Published 14-08-2025Last modified 14-08-2025
Open JSON

Vulnerability summary

CVE-2025-20219 is a medium (CVSS 5.3) Improper Access Control vulnerability in cisco cisco adaptive security appliance (asa) software. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.8% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.38%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-08-2025
    PublishedVulnerability first disclosed.
  2. 14-08-2025
    Last modifiedVulnerability information updated.

Description

A vulnerability in the implementation of access control rules for loopback interfaces in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to send traffic that should have been blocked to a loopback interface. This vulnerability is due to improper enforcement of access control rules for loopback interfaces. An attacker could exploit this vulnerability by sending traffic to a loopback interface on an affected device. A successful exploit could allow the attacker to bypass configured access control rules and send traffic that should have been blocked to a loopback interface on the device.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

0.00 pp

From 0.38% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.38%

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
  • cisco adaptive security appliance (asa) software9.18.2 | 9.18.2.5 | 9.18.2.7 | 9.19.1 | 9.18.2.8 | 9.18.3 | 9.19.1.5 | 9.19.1.9 | 9.18.3.39 | 9.19.1.12 | 9.18.3.46 | 9.19.1.18 | 9.18.3.53 | 9.18.3.55 | 9.18.3.56 | 9.20.1 | 9.19.1.22 | 9.18.4 | 9.20.1.5 | 9.18.4.5 | 9.19.1.24 | 9.18.4.8 | 9.20.2 | 9.19.1.27 | 9.18.4.22 | 9.20.2.10 | 9.19.1.28 | 9.18.4.24 | 9.20.2.21 | 9.19.1.31 | 9.18.4.29 | 9.20.2.22 | 9.18.4.34 | 9.20.3 | 9.18.4.40 | 9.22.1.1 | 9.20.3.4 | 9.18.4.47 | 9.20.3.7 | 9.19.1.37 | 9.20.3.9 | 9.19.1.38 | 9.18.4.50 | 9.22.1.2
  • cisco firepower threat defense software7.3.0 | 7.3.1 | 7.3.1.1 | 7.4.0 | 7.4.1 | 7.4.1.1 | 7.3.1.2 | 7.6.0 | 7.4.2 | 7.4.2.1

1 vendor · 2 products

References

1 links