Denial of Service Vulnerability in ClamAV by Cisco
CVE-2026-20348

7.5HIGH

Key Information:

Vendor

Cisco
Status
Cisco Secure Endpoint
Vendor
CVE Published:
7 August 2026

Badges

👾 Exploit Exists

What is CVE-2026-20348?

A vulnerability in ClamAV's XAR file format parser allows unauthenticated remote attackers to initiate a Denial of Service (DoS) condition. Due to improper boundary checks during the scanning of XAR files, an attacker can submit a specially crafted file, leading to potential memory corruption and the termination of the ClamAV scanning process. This could severely disrupt the affected software's functionality.

Affected Version(s)

Cisco Secure Endpoint 7.0.5

Cisco Secure Endpoint 6.2.19

Cisco Secure Endpoint 7.3.3

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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