CVE-2026-20348
published 2026-08-07CVE-2026-20348: A vulnerability in the XAR file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded…
PriorityP349high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.62%
48.9th percentile
A vulnerability in the XAR file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device.
This vulnerability is due to improper boundary checks for content in XAR files during scanning. An attacker could exploit this vulnerability by submitting a crafted file that contains XAR 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.
Affected
151 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
| cisco | cisco_secure_endpoint | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_ubuntu7.5HIGH
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Ubuntu
ClamAV vulnerabilities
vendor_ubuntu·2026-09-21·CVSS 7.5
CVE-2026-20348 [HIGH] ClamAV vulnerabilities
Title: ClamAV vulnerabilities
Summary: Several security issues were fixed in ClamAV.
It was discovered that ClamAV incorrectly handled certain zip archive
files. A remote attacker could possibly use this issue to cause ClamAV
to crash, resulting in a denial of service. (CVE-2026-20337,
CVE-2026-20338)
It was discovered that ClamAV incorrectly handled certain PESpin files.
A remote attacker could possibly use this issue to cause ClamAV to
crash, resulting in a denial of service. (CVE-2026-20339)
It was discovered that ClamAV incorrectly handled certain GPT files. A
remote attacker could possibly use this issue to cause ClamAV to crash,
resulting in a denial of service. (CVE-2026-20345)
It was discovered that ClamAV incorrectly handled certain PDF files. A
remote attacker could possibly
VulDB
Cisco ClamAV up to 8.4.5.30483 XAR File Format Parser memory corruption (EUVD-2026-54508)
vuldb·2026-08-07·CVSS 7.5
CVE-2026-20348 [HIGH] Cisco ClamAV up to 8.4.5.30483 XAR File Format Parser memory corruption (EUVD-2026-54508)
A vulnerability, which was classified as critical, was found in Cisco ClamAV. Affected by this vulnerability is an unknown functionality of the component XAR File Format Parser. Executing a manipulation can lead to memory corruption.
This vulnerability is handled as CVE-2026-20348. The attack can be executed remotely. There is not any exploit available.
You should upgrade the affected component.
GHSA
A vulnerability in the XAR file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruptio
ghsa_unreviewed·2026-08-07
CVE-2026-20348 [HIGH] CWE-120 A vulnerability in the XAR file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruptio
A vulnerability in the XAR file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device.
This vulnerability is due to improper boundary checks for content in XAR files during scanning. An attacker could exploit this vulnerability by submitting a crafted file that contains XAR 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.
No detection rules found.
No public exploits indexed.
2026-08-07
Published