5.8

CVE-2026-20013: cisco adaptive_security_appliance_software

CVSS: 5.8v3.1MediumAnalyzed
Published 04-03-2026Last modified 04-03-2026
Open JSON

Vulnerability summary

CVE-2026-20013 is a medium (CVSS 5.8) vulnerability in cisco adaptive_security_appliance_software. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 22.8% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.31%
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. 04-03-2026
    PublishedVulnerability first disclosed.
  2. 04-03-2026
    Last modifiedVulnerability information updated.

Description

A vulnerability in the IKEv2 feature of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device that may also impact the availability of services to devices elsewhere in the network. This vulnerability is due to memory exhaustion caused by not freeing memory during IKEv2 packet processing. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. A successful exploit could allow the attacker to exhaust resources, causing a DoS condition that will eventually require the device to manually reload.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

+0.01 pp

From 0.30% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.31%

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

Cisco4 products
  • adaptive_security_appliance_software≥ 9.18.1, < 9.18.4.66 | ≥ 9.19.1, < 9.20.3.20 | ≥ 9.22.1.1, < 9.22.2.4 | ≥ 9.23.1, < 9.23.1.3
  • cisco secure firewall adaptive security appliance (asa) software9.12.1 | 9.12.1.2 | 9.12.1.3 | 9.12.2 | 9.12.2.4 | 9.12.2.5 | 9.12.2.9 | 9.12.3 | 9.12.3.2 | 9.12.3.7 | 9.12.4 | 9.12.3.12 | 9.12.3.9 | 9.12.2.1 | 9.12.4.2 | 9.12.4.4 | 9.12.4.7 | 9.12.4.10 | 9.12.4.13 | 9.12.4.8 | 9.12.4.18 | 9.12.4.24 | 9.12.4.26 | 9.12.4.29 | 9.12.4.30 | 9.12.4.35 | 9.12.4.37 | 9.12.4.38 | 9.12.4.39 | 9.12.4.40 | 9.12.4.41 | 9.12.4.47 | 9.12.4.48 | 9.12.4.50 | 9.12.4.52 | 9.12.4.54 | 9.12.4.55 | 9.12.4.56 | 9.12.4.58 | 9.12.4.62 | 9.12.4.65 | 9.12.4.67 | 9.16.1 | 9.16.1.28 | 9.16.2 | 9.16.2.3 | 9.16.2.7 | 9.16.2.11 | 9.16.2.13 | 9.16.2.14 | 9.16.3 | 9.16.3.3 | 9.16.3.14 | 9.16.3.15 | 9.16.3.19 | 9.16.3.23 | 9.16.4 | 9.16.4.9 | 9.16.4.14 | 9.16.4.19 | 9.16.4.27 | 9.16.4.38 | 9.16.4.39 | 9.16.4.42 | 9.16.4.48 | 9.16.4.55 | 9.16.4.57 | 9.16.4.61 | 9.16.4.62 | 9.16.4.67 | 9.16.4.70 | 9.16.4.71 | 9.16.4.76 | 9.16.4.82 | 9.16.4.84 | 9.17.1 | 9.17.1.7 | 9.17.1.9 | 9.17.1.10 | 9.17.1.11 | 9.17.1.13 | 9.17.1.15 | 9.17.1.20 | 9.17.1.30 | 9.17.1.33 | 9.17.1.39 | 9.17.1.45 | 9.17.1.46 | 9.18.1 | 9.18.1.3 | 9.18.2 | 9.18.2.5 | 9.18.2.7 | 9.18.2.8 | 9.18.3 | 9.18.3.39 | 9.18.3.46 | 9.18.3.53 | 9.18.3.55 | 9.18.3.56 | 9.18.4 | 9.18.4.5 | 9.18.4.8 | 9.18.4.22 | 9.18.4.24 | 9.18.4.29 | 9.18.4.34 | 9.18.4.40 | 9.18.4.47 | 9.18.4.50 | 9.18.4.52 | 9.18.4.53 | 9.18.4.57 | 9.19.1 | 9.19.1.5 | 9.19.1.9 | 9.19.1.12 | 9.19.1.18 | 9.19.1.22 | 9.19.1.24 | 9.19.1.27 | 9.19.1.28 | 9.19.1.31 | 9.19.1.37 | 9.19.1.38 | 9.19.1.42 | 9.20.1 | 9.20.1.5 | 9.20.2 | 9.20.2.10 | 9.20.2.21 | 9.20.2.22 | 9.20.3 | 9.20.3.4 | 9.20.3.7 | 9.20.3.9 | 9.20.3.10 | 9.20.3.13 | 9.20.3.16 | 9.20.3.20 | 9.22.1.1 | 9.22.1.3 | 9.22.1.2 | 9.22.1.6 | 9.22.2 | 9.22.2.4 | 9.23.1 | 9.23.1.3 | 9.23.1.7
  • cisco secure firewall threat defense (ftd) software6.4.0 | 6.4.0.1 | 6.4.0.3 | 6.4.0.2 | 6.4.0.4 | 6.4.0.5 | 6.4.0.6 | 6.4.0.7 | 6.4.0.8 | 6.4.0.9 | 6.4.0.10 | 6.4.0.11 | 6.4.0.12 | 6.4.0.13 | 6.4.0.14 | 6.4.0.15 | 6.4.0.16 | 6.4.0.17 | 6.4.0.18 | 7.0.0 | 7.0.0.1 | 7.0.1 | 7.0.1.1 | 7.0.2 | 7.0.2.1 | 7.0.3 | 7.0.4 | 7.0.5 | 7.0.6 | 7.0.6.1 | 7.0.6.2 | 7.0.6.3 | 7.0.7 | 7.0.8 | 7.0.8.1 | 7.1.0 | 7.1.0.1 | 7.1.0.2 | 7.1.0.3 | 7.2.0 | 7.2.0.1 | 7.2.1 | 7.2.2 | 7.2.3 | 7.2.4 | 7.2.4.1 | 7.2.5 | 7.2.5.1 | 7.2.6 | 7.2.7 | 7.2.5.2 | 7.2.8 | 7.2.8.1 | 7.2.9 | 7.2.10 | 7.2.10.2 | 7.3.0 | 7.3.1 | 7.3.1.1 | 7.3.1.2 | 7.4.0 | 7.4.1 | 7.4.1.1 | 7.4.2 | 7.4.2.1 | 7.4.2.2 | 7.4.2.3 | 7.4.2.4 | 7.6.0 | 7.6.1 | 7.6.2 | 7.6.2.1 | 7.7.0 | 7.7.10 | 7.7.10.1
  • secure_firewall_threat_defense≥ 7.2.0, < 7.2.11 | ≥ 7.3.0, < 7.4.3 | ≥ 7.6.0, < 7.6.4 | ≥ 7.7.0, < 7.7.10

1 vendor · 4 products

References

1 links