[UPDATE] [medium] ClamAV: Multiple vulnerabilities

mediumCVE-2026-20213 CVE-2026-20214 CVE-2026-20215 CVE-2026-20216 CVE-2026-20217 CVE-2026-20243

A remote, anonymous attacker can exploit multiple vulnerabilities in ClamAV to conduct a denial of service attack or disclose confidential information.

CSIRTS triage

vendor: ClamAV product: ClamAV Denial of service Information disclosure

What: Multiple vulnerabilities can lead to denial of service attacks or disclose confidential information.
Who is affected: Deployments of ClamAV.
Urgency: Remediation is medium urgency as the vulnerabilities are not currently exploited.
Action: Update to the latest version of ClamAV.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-10
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2173

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-2026-202130.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all scored CVEs.
Low exploitation riskCVE-2026-202140.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all scored CVEs.
Low exploitation riskCVE-2026-202150.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all scored CVEs.
Low exploitation riskCVE-2026-202160.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all scored CVEs.
Low exploitation riskCVE-2026-202170.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all scored CVEs.
Low exploitation riskCVE-2026-202430.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all scored CVEs.
Low exploitation riskCVE-2026-202440.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-20213	coverage & exploitation status	NVD · CVE.org
CVE-2026-20214	coverage & exploitation status	NVD · CVE.org
CVE-2026-20215	coverage & exploitation status	NVD · CVE.org
CVE-2026-20216	coverage & exploitation status	NVD · CVE.org
CVE-2026-20217	coverage & exploitation status	NVD · CVE.org
CVE-2026-20243	coverage & exploitation status	NVD · CVE.org
CVE-2026-20244	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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.

unknownUSN-8517-1: ClamAV vulnerabilitiesubuntu · 2026-07-08
highClamAV Vulnerabilities Affecting Cisco Products: July 2026cisco-psirt · 2026-07-02
highCVE-2026-20214: ClamAV FSG File Format Processing Out-of-Bounds Memory Corruption Vulnerabilitymsrc · 2026-07-02
highCVE-2026-20215: ClamAV 7Zip File Format Processing Out-of-Bounds Memory Corruption Vulnerabilitymsrc · 2026-07-02
highCVE-2026-20216: ClamAV InstallShield File Format Processing Resource Exhaustion Vulnerabilitymsrc · 2026-07-02
highCVE-2026-20217: ClamAV PESpin File Format Processing Out-of-Bounds Memory Corruption Vulnerabilitymsrc · 2026-07-02