7.5

CVE-2026-20338: cisco cisco secure endpoint Double Free

CVSS: 7.5v3.1HighAwaiting analysis
AliasesUBUNTU-CVE-2026-20338CGA-77r4-6q6f-vgqrCGA-7v2h-87rj-2jw3
Published 07-08-2026Last modified 07-08-2026
Open JSON

Vulnerability summary

CVE-2026-20338 is a high (CVSS 7.5) Double Free vulnerability in cisco cisco secure endpoint. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 9
OPENSUSE-SU-2026:11583-1OPENSUSE-SU-2026:21831-1SUSE-SU-2026:23706-1SUSE-SU-2026:23727-1SUSE-SU-2026:4179-1SUSE-SU-2026:4180-1

Timeline

  1. 07-08-2026
    PublishedVulnerability first disclosed.
  2. 07-08-2026
    Last modifiedVulnerability information updated.

Description

A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper memory handling when processing content in zip files during scanning. An attacker could exploit this vulnerability by submitting a crafted zip file for scanning. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate as a result of a memory double-free, resulting in a DoS condition on the affected software.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

0.00 pp

From 0.47% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.47%

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

Chainguard2 products
  • clamav-1.5< 1.5.4-r0
  • clamav-1.5-scanner< 1.5.4-r2
Wolfi2 products
  • clamav-1.5< 1.5.4-r0
  • clamav-1.5-scanner< 1.5.4-r2
Cisco1 product
  • cisco secure endpoint7.0.5 | 6.2.19 | 7.3.3 | 7.2.13 | 6.1.5 | 6.3.1 | 6.2.5 | 7.3.5 | 6.2.1 | 7.2.7 | 7.1.1 | 6.3.5 | 6.2.9 | 7.3.1 | 6.1.7 | 7.2.11 | 7.2.3 | 7.1.5 | 6.3.3 | 7.3.9 | 6.2.3 | 6.1.9 | 6.0.9 | 7.2.5 | 6.0.7 | 6.3.7 | 1.12.3 | 1.8.0 | 1.11.1 | 1.12.4 | 1.10.0 | 1.12.0 | 1.8.1 | 1.10.1 | 1.12.1 | 1.12.6 | 1.14.0 | 1.10.2 | 1.12.7 | 1.12.2 | 1.6.0 | 1.9.0 | 1.11.0 | 1.7.0 | 1.13.0 | 1.8.4 | 1.13.1 | 1.9.1 | 1.12.5 | 1.13.2 | 8.1.7.21512 | 8.1.7 | 8.1.5 | 8.1.3.21242 | 8.1.3 | 8.1.5.21322 | 8.1.7.21417 | 1.14.1 | 1.15.1 | 1.15.2 | 1.15.3 | 1.15.4 | 1.15.5 | 1.15.6 | 1.16.0 | 1.16.1 | 1.16.2 | 1.16.3 | 1.18.0 | 1.18.1 | 1.20.0 | 1.21.0 | 1.21.1 | 1.21.2 | 1.21.3 | 1.22.0 | 1.22.1 | 1.22.2 | 1.22.3 | 1.22.4 | 1.24.0 | 1.24.1 | 1.24.2 | 1.24.3 | 1.24.4 | 1.26.0 | 1.24.5 | 1.26.1 | 1.27.0 | 1.15.0 | 1.17.0 | 1.17.1 | 1.17.2 | 1.19.0 | 1.20.1 | 1.20.2 | 1.20.3 | 1.20.4 | 1.20.5 | 1.20.6 | 1.23.0 | 1.23.1 | 1.20.7 | 1.20.8 | 1.25.0 | 1.25.1 | 1.25.2 | 1.27.1 | 1.27.2 | 7.3.13 | 7.3.15 | 7.4.1 | 7.4.1.20425 | 7.4.1.20439 | 7.4.3 | 7.4.3.20679 | 7.4.5 | 7.5.1.20813 | 7.5.1.20833 | 7.5.3 | 7.5.5 | 8.0.1.21160 | 8.0.1.21164 | 7.5.7 | 7.5.9 | 7.5.11 | 8.1.7.21585 | 7.5.13.21586 | 7.5.13.21598 | 8.2.1.21612 | 8.2.1.21650 | 7.5.15.21611 | 7.5.17.21680 | 8.2.3.30119 | 8.2.4.30130 | 8.4.0 | 7.5.19 | 8.4.1.30298 | 8.4.2.30317 | 8.4.1.30307 | 7.5.20 | 8.4.3 | 8.4.4.30419 | 8.4.4.30467 | 7.5.21.21732 | 8.4.5.30483
Ubuntu1 product
  • clamavAll versions (No fix recorded) | < 1.5.4+dfsg-0ubuntu0.22.04.1 | < 1.5.4+dfsg-0ubuntu0.24.04.1 | < 1.5.4+dfsg-0ubuntu0.26.04.1

4 vendors · 6 products

References

5 links