CVE-2026-20346: Out-of-bounds Read in Cisco Cisco Secure Endpoint
A vulnerability in the PDF file format parser of ClamAV allows an unauthenticated remote attacker to cause a denial-of-service (DoS) condition due to improper boundary checks leading to out-of-bounds buffer reads. This memory corruption issue can terminate the ClamAV scanning process when a crafted PDF file is scanned.
AI Analysis
Technical Summary
CVE-2026-20346 is a high-severity vulnerability in ClamAV's PDF parser caused by improper boundary checks during PDF content scanning. This flaw can be exploited by submitting a maliciously crafted PDF file to ClamAV, triggering an out-of-bounds buffer read that results in memory corruption. The primary impact is a denial-of-service condition where the scanning process crashes. No evidence of confidentiality or integrity impact is indicated. The vulnerability does not require authentication and can be triggered remotely.
Potential Impact
Successful exploitation results in a denial-of-service condition by crashing the ClamAV scanning process. There is no confirmed impact on confidentiality or integrity. The vulnerability affects availability of the scanning service on the affected device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider restricting or validating PDF files submitted for scanning to reduce exposure to crafted malicious PDFs.
CVE-2026-20346: Out-of-bounds Read in Cisco Cisco Secure Endpoint
Description
A vulnerability in the PDF file format parser of ClamAV allows an unauthenticated remote attacker to cause a denial-of-service (DoS) condition due to improper boundary checks leading to out-of-bounds buffer reads. This memory corruption issue can terminate the ClamAV scanning process when a crafted PDF file is scanned.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-20346 is a high-severity vulnerability in ClamAV's PDF parser caused by improper boundary checks during PDF content scanning. This flaw can be exploited by submitting a maliciously crafted PDF file to ClamAV, triggering an out-of-bounds buffer read that results in memory corruption. The primary impact is a denial-of-service condition where the scanning process crashes. No evidence of confidentiality or integrity impact is indicated. The vulnerability does not require authentication and can be triggered remotely.
Potential Impact
Successful exploitation results in a denial-of-service condition by crashing the ClamAV scanning process. There is no confirmed impact on confidentiality or integrity. The vulnerability affects availability of the scanning service on the affected device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider restricting or validating PDF files submitted for scanning to reduce exposure to crafted malicious PDFs.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-f8f4-wm7g-gp3c
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-20346"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a7742a1bf8831d539b0850a
Added to database: 08/08/2026, 14:52:17 UTC
Last enriched: 08/08/2026, 15:16:42 UTC
Last updated: 08/09/2026, 03:40:59 UTC
Views: 3
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