Multiple vulnerabilities in Samba (July 28, 2026)

unknownCVE-2026-58222 CVE-2026-58221 CVE-2026-58224 CVE-2026-58218 CVE-2026-58216 CVE-2025-58218

Multiple vulnerabilities have been discovered in Samba. Some of them allow an attacker to cause a remote denial of service, a breach of data confidentiality, and a bypass of the security policy.

CSIRTS triage

vendor: Samba product: Samba Denial of service Information disclosure Authentication bypassOther

What: Multiple vulnerabilities in Samba can lead to denial of service, data breaches, and security policy bypass.
Who is affected: Attackers can exploit these vulnerabilities in Samba installations.
Urgency: Remediation is urgent as these vulnerabilities can significantly impact service availability and data security.
Action: Users should apply updates to Samba to address these vulnerabilities.

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

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Details

Source: CERT-FR Avis de sécurité (FR · national-cert · site)
Severity: unknown
Published: 2026-07-28
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0939/

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-2026-582220.84% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 54% of all scored CVEs.
Moderate exploitation riskCVE-2026-582181.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 62% of all scored CVEs.
Low exploitation riskCVE-2026-582160.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all scored CVEs.
Low exploitation riskCVE-2025-582180.38% 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-2026-58222	coverage & exploitation status	NVD · CVE.org
CVE-2026-58221	coverage & exploitation status	NVD · CVE.org
CVE-2026-58224	coverage & exploitation status	NVD · CVE.org
CVE-2026-58218	coverage & exploitation status	NVD · CVE.org
CVE-2026-58216	coverage & exploitation status	NVD · CVE.org
CVE-2025-58218	coverage & exploitation status	NVD · CVE.org
CVE-2026-6949	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 Samba

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] Samba: Multiple vulnerabilitiescert-bund · 2026-07-31
highCVE-2026-58222: A security flaw combining LDAP filter injection and improper authorization checks was found in…nvd · 2026-07-30
mediumCVE-2026-58216: An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) passw…nvd · 2026-07-30
mediumCVE-2026-58218: A flaw was found in Samba's internal DNS server where unauthenticated TKEY registration reques…nvd · 2026-07-30
medium[NEW] [UNPATCHED] [medium] Samba: Vulnerability allows Denial of Servicecert-bund · 2026-07-29
unknownUSN-8621-1: Samba vulnerabilitiesubuntu · 2026-07-28