ClamAV Chaos: Cisco’s Bug Fix Sparks Exploit Alert!
Cisco warns of a ClamAV bug with proof-of-concept exploit. The flaw could allow remote attackers to crash scans and cause denial-of-service conditions. It’s an open-source antivirus engine issue affecting Linux, Mac, and Windows. Don’t let your antivirus take a sick day—update now!

Hot Take:
Who knew that ClamAV had a secret talent for crashing parties, and by parties I mean your entire antivirus scanning process? It seems like this open-source shellfish is trying to live up to its name by clamming up when things get rough! Cisco has swooped in just in time to save the day, or at least save your system from going into a denial of service-induced coma.
Key Points:
- Cisco has released updates to fix a ClamAV DoS vulnerability, known as CVE-2025-20128.
- The flaw is in the OLE2 decryption routine and poses a risk of causing denial of service.
- A PoC exploit code is available, but no active attacks exploiting this vulnerability have been reported.
- The vulnerability impacts multiple platforms including Linux, Mac, and Windows.
- Previously, Cisco fixed another critical flaw, CVE-2023-20032, affecting the ClamAV product.
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