[UPDATE] [medium] Samba: Vulnerability allows Denial of Service
A remote, anonymous attacker can exploit a vulnerability in Samba to conduct a Denial of Service attack.
CSIRTS triage
- What
- A vulnerability allows Denial of Service.
- Who is affected
- Remote, anonymous attackers can exploit this vulnerability in Samba.
- Urgency
- Remediation is medium urgency due to the medium severity of the vulnerability.
- Action
- Apply patches or updates as they become available.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1508
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-2026-401700.78% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-40170 | coverage & exploitation status | NVD · CVE.org |
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
More from CERT-Bund (BSI) Security Advisories
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of service2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow Denial of Service2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of service2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow unspecified attack2026-07-31