Multiple vulnerabilities in ClamAV (July 2, 2026)
Multiple vulnerabilities have been discovered in ClamAV. They allow an attacker to cause denial of service and an unspecified security issue by the vendor.
CSIRTS triage
- What
- Multiple vulnerabilities allow for denial of service and an unspecified security issue.
- Who is affected
- Users of ClamAV are affected.
- Urgency
- Remediation is urgent due to the potential for exploitation.
- Action
- Apply patches or mitigations as provided by ClamAV.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0824/
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-202160.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-202430.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-202150.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-202130.56% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-202140.56% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-202170.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-202440.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-416760.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-20216 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20243 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20215 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20213 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20214 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20217 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20244 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-41676 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[UPDATE] [high] Oracle Linux: Multiple vulnerabilitiescert-bund
- medium[UPDATE] [medium] ClamAV: Multiple vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Microsoft Azure Linux (July 15, 2026)cert-fr-avis
- highCVE-2026-20217: ClamAV PESpin File Format Processing Out-of-Bounds Memory Corruption Vulnerabilitymsrc
- highCVE-2026-20244: ClamAV DMG File Processing Denial of Service Vulnerabilitymsrc
- highCVE-2026-20213: ClamAV PE File Format Processing Out-of-Bounds Memory Corruption Vulnerabilitymsrc
- highCVE-2026-20215: ClamAV 7Zip File Format Processing Out-of-Bounds Memory Corruption Vulnerabilitymsrc
- highCVE-2026-20243: ClamAV ALZ Archive Processing Denial of Service Vulnerabilitymsrc
- highCVE-2026-20216: ClamAV InstallShield File Format Processing Resource Exhaustion Vulnerabilitymsrc
- highCVE-2026-20214: ClamAV FSG File Format Processing Out-of-Bounds Memory Corruption Vulnerabilitymsrc
- unknownUSN-8517-1: ClamAV vulnerabilitiesubuntu
- highClamAV Vulnerabilities Affecting Cisco Products: July 2026cisco-psirt
Recent advisories for ClamAV
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[NEW] [high] ClamAV: Multiple vulnerabilities allow Denial of Service and disclosure of informationcert-bund · 2026-08-18
- highClamAV Vulnerabilities Affecting Cisco Products: August 2026cisco-psirt · 2026-08-13
- highCVE-2026-20338: ClamAV ZIP File Format Processing Memory Corruption Vulnerabilitymsrc · 2026-08-11
- highCVE-2026-20337: ClamAV ZIP File Format Processing Memory Corruption Vulnerabilitymsrc · 2026-08-11
- highCVE-2026-20347: ClamAV Mach-O File Format Processing Memory Corruption Vulnerabilitymsrc · 2026-08-11
- highCVE-2026-20346: ClamAV PDF File Format Processing Memory Corruption Vulnerabilitymsrc · 2026-08-11
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