ClamAV InstallShield File Format Processing Resource Exhaustion Vulnerability
Summary
| CVE | CVE-2026-20216 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-01 17:16:29 UTC |
| Updated | 2026-07-01 18:16:31 UTC |
| Description | A vulnerability in the InstallShield file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper handling of temporary resources during file scanning. An attacker could exploit this vulnerability by submitting a crafted InstallShield file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process and temporarily consume available system resources, resulting in a DoS condition on the affected software. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.003890000 probability, percentile 0.308920000 (date 2026-07-04)
Problem Types: CWE-770 | CWE-770 Allocation of Resources Without Limits or Throttling
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSSV3_1 | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cisco | Cisco Secure Endpoint | affected 7.0.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.2.19 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.3.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.2.13 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.1.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.3.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.2.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.3.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.2.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.2.7 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.1.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.3.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.2.9 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.3.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.1.7 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.2.11 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.2.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.1.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.3.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.3.9 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.2.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.1.9 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.0.9 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.2.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.0.7 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 6.3.7 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.12.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.8.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.11.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.12.4 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.10.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.12.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.8.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.10.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.12.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.12.6 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.14.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.10.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.12.7 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.12.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.6.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.9.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.11.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.7.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.13.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.8.4 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.13.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.9.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.12.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.13.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.1.7.21512 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.1.7 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.1.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.1.3.21242 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.1.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.1.5.21322 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.1.7.21417 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.14.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.15.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.15.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.15.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.15.4 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.15.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.15.6 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.16.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.16.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.16.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.16.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.18.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.18.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.20.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.21.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.21.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.21.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.21.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.22.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.22.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.22.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.22.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.22.4 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.24.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.24.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.24.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.24.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.24.4 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.26.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.24.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.26.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.27.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.15.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.17.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.17.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.17.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.19.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.20.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.20.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.20.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.20.4 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.20.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.20.6 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.23.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.23.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.20.7 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.20.8 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.25.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.25.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.25.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.27.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 1.27.2 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.3.13 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.3.15 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.4.1 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.4.1.20425 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.4.1.20439 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.4.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.4.3.20679 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.4.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.1.20813 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.1.20833 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.5 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.0.1.21160 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.0.1.21164 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.7 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.9 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.11 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.1.7.21585 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.13.21586 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.13.21598 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.2.1.21612 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.2.1.21650 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.15.21611 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.17.21680 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.2.3.30119 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.2.4.30130 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.4.0 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.19 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.4.1.30298 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.4.2.30317 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.4.1.30307 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.20 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.4.3 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.4.4.30419 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.4.4.30467 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 7.5.21.21732 | Not specified |
| CNA | Cisco | Cisco Secure Endpoint | affected 8.4.5.30483 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav... | [email protected] | sec.cloudapps.cisco.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Exploits
CNA: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.
There are currently no legacy QID mappings associated with this CVE.