VulnerabilityPublished 28 Oct 2026Updated 29 Oct 2026

CVE-2026-109411: Samba · [Unknown description]

Affects sambaSource GCVE Database

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Authoritative record:CVE-2026-109411· High 8.1

Not known to be exploited · CVSS 8.1 High.

Data as of 29 Oct 2026, 22:36 UTC

CVSS 3.1 base score

8.1High

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CNA (redhat)	CVSS 3.1	8.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Ubuntu 26.10samba`pkg:deb/ubuntu/samba?arch=source&distro=stonking`Other threats	Affected 2:4.23.6+dfsg-1ubuntu2 – 2:4.24.7+dfsg-1ubuntu1 5 affected builds	Fixed in–
Ubuntu 26.04 LTSsamba`pkg:deb/ubuntu/samba?arch=source&distro=resolute`Other threats	Affected 2:4.22.3+dfsg-4ubuntu2 – 2:4.23.6+dfsg-1ubuntu2.2 10 affected builds	Fixed in–
Ubuntu 24.04 LTSsamba`pkg:deb/ubuntu/samba?arch=source&distro=noble`Other threats	Affected 2:4.18.6+dfsg-1ubuntu2 – 2:4.19.5+dfsg-4ubuntu9.8 14 affected builds	Fixed in–
Ubuntu 22.04 LTSsamba`pkg:deb/ubuntu/samba?arch=source&distro=jammy`Other threats	Affected 2:4.13.5+dfsg-2ubuntu2 – 2:4.15.13+dfsg-0ubuntu1.13 24 affected builds	Fixed in–
Ubuntu Pro 20.04 LTSsamba`pkg:deb/ubuntu/samba?arch=source&distro=esm-infra/focal`Other threats	Affected 2:4.10.7+dfsg-0ubuntu2 – 2:4.15.13+dfsg-0ubuntu0.20.04.8+esm2 37 affected builds	Fixed in–
Ubuntu Pro 18.04 LTSsamba`pkg:deb/ubuntu/samba?arch=source&distro=esm-infra/bionic`Other threats	Affected 2:4.6.7+dfsg-1ubuntu3 – 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm3 32 affected builds	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, consider restricting access to affected Samba versions and monitoring for unusual activity related to Samba services.

Description

CVE-2026-109411 is a high-severity vulnerability affecting multiple specific versions of Samba, a widely used file sharing service. The vulnerability has a CVSS 3.1 base score of 8.1, indicating it allows an attacker with low privileges to cause high impact on confidentiality and integrity without user interaction. The exact nature of the vulnerability is not described in the available data.

Impact

An attacker with low privileges can exploit this vulnerability remotely to compromise confidentiality and integrity of the affected Samba service. There is no indication of availability impact. No known exploits are reported in the wild at this time.

Summary

This vulnerability (CVE-2026-109411) affects Samba versions specifically listed in the Ubuntu package versions from 2:3.6.18-1ubuntu3 through various 4.1.6+dfsg builds. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality and integrity, with no impact on availability. No public exploit or detailed technical description is provided. The vulnerability was published on 2026-10-28.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Oct 2026, 22:36 UTC

Technical details

References

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