CVE detail
CVE-2026-20215
A vulnerability in the 7z file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in 7z files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains 7z content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 17.9 · diversity 16.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 5
- within the 30d window
- Peak daily
- 2
- highest bucket
Evidence
Source links by recency
5 source links · newest first
- CVE-2026-20215 ClamAV 7Zip File Format Processing Out-of-Bounds Memory Corruption VulnerabilityMicrosoft MSRC
Information published.
vendormsrc.microsoft.comJul 11, 2026, 8:01 AM Open source antivirus scanning sits inside mail gateways, file upload checks, and endpoint tooling at organizations of every size. Much of that work runs through ClamAV, the scanning engine maintained by Cisco’s Talos group. The project released two patch versions, 1.5.3 and 1.4.5, carrying fixes for seven security flaws along with smaller hardening changes. Packer and PE parsing flaws Most of the patched bugs sit in the code that unpacks and parses executable formats, the … More →
newswww.helpnetsecurity.comJul 5, 2026, 10:30 PM- ClamAV Vulnerabilities Affecting Cisco Products: July 2026Cisco Security Advisories
apps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-88cFYyxR Security Impact Rating: High CVE: CVE-2026-20213,CVE-2026-20214,CVE-2026-20215,CVE-2026-20216,CVE-2026-20217,CVE-2026-20243,CVE-2026-20244
vendorsec.cloudapps.cisco.comJul 2, 2026, 8:52 PM - https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-88cFYyxRsec.cloudapps.cisco.com
No excerpt available.
Vendor Advisorysec.cloudapps.cisco.comJul 1, 2026, 5:16 PM - Cisco Advance Notification for Publication of July 1, 2026, Security AdvisoriesCisco Security Advisories
Security Advisory CVE-ID Security Impact Rating CVSS Base Score Cisco Catalyst Center Arbitrary File Read Vulnerability CVE-2026-20191 High 7.5 ClamAV Vulnerabilities Affecting Cisco Products: July 2026 CVE-2026-20216 CVE-2026-20213 CVE-2026-20214 CVE-2026-20215 CVE-2026-20217 CVE-2026-20243 CVE-2026-20244 High 7.5 To fully remediate the vulnerabilitie
vendorsec.cloudapps.cisco.comJul 1, 2026, 4:01 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
Related records
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- CVE-2023-20032CVSS 9.8 · Critical
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