Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 1.86% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2019
CVE-2019-14833High confidence
Samba samba: Authentication Bypass by Primary Weakness
Samba · samba
5.4MediumCVSS 3.1
Scheduled
Patch availableMedium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityMedium→Operational priority:Medium, unchanged from published severity.unchanged
Compensating controls
- Validate the affected product branch and deploy the verified fixed release.
- Restrict the affected network interface to trusted sources where business-safe.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs Samba samba and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Distribution package intelligence
7 package statesRelease-specific package status
Alpine, Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.
Repository candidate not checked
A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.
| Distribution release | Source package | Vendor state | Fixed version | Evidence |
|---|---|---|---|---|
| Alpine v3.23v3.23 · main | samba | Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected. | 4.11.2-r0 | Alpine Security Database ↗Source updated 23 Oct 2026 |
| Alpine v3.22v3.22 · main | samba | Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected. | 4.11.2-r0 | Alpine Security Database ↗Source updated 23 Oct 2026 |
| Alpine v3.21v3.21 · main | samba | Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected. | 4.11.2-r0 | Alpine Security Database ↗Source updated 23 Oct 2026 |
| Debian trixietrixie · source | samba | Vendor fix publishedDebian records a fixed source-package version for this release. | 2:4.11.1+dfsg-2 | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Debian bookwormbookworm · source | samba | Vendor fix publishedDebian records a fixed source-package version for this release. | 2:4.11.1+dfsg-2 | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Debian forkyforky · source | samba | Vendor fix publishedDebian records a fixed source-package version for this release. | 2:4.11.1+dfsg-2 | Debian Security Tracker ↗Source updated 23 Oct 2026 |
| Debian sidsid · source | samba | Vendor fix publishedDebian records a fixed source-package version for this release. | 2:4.11.1+dfsg-2 | Debian Security Tracker ↗Source updated 23 Oct 2026 |
Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.
Patch available01
What, why and how
A flaw was found in Samba, all versions starting samba 4.5.0 before samba 4.9.15, samba 4.10.10, samba 4.11.2, in the way it handles a user password change or a new password for a samba user. The Samba Active Directory Domain Controller can be configured to use a custom script to check for password complexity. This configuration can fail to verify password complexity when non-ASCII characters are used in the password, which could lead to weak passwords being set for samba users, making it vulnerable to dictionary attacks.
What
A flaw was found in Samba, all versions starting samba 4.5.0 before samba 4.9.15, samba 4.10.10, samba 4.11.2, in the way it handles a user password change or a new password for a samba user. The Samba Active Directory Domain Controller can be configured to use a custom script to check for password complexity. This configuration can fail to verify password complexity when non-ASCII characters are used in the password, which could lead to weak passwords being set for samba users, making it vulnerable to dictionary attacks.
Why
The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
A flaw was found in Samba, all versions starting samba 4.5.0 before samba 4.9.15, samba 4.10.10, samba 4.11.2, in the way it handles a user password change or a new password for a samba user. The Samba Active Directory Domain Controller can be configured to use a custom script to check for password complexity. This configuration can fail to verify password complexity when non-ASCII characters are used in the password, which could lead to weak passwords being set for samba users, making it vulnerable to dictionary attacks.
Why
The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- a network path → Authentication Bypass by Primary Weakness → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Network
- Privileges required
- Low: a basic authenticated account is required
- User interaction
- None
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Unchanged: impact remains within the vulnerable component's security authority
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-305 ↗
CWE-305: Authentication Bypass by Primary Weakness. The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NCommon Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CLowConfidentiality impact: A successful attack can cause a limited loss.ILowIntegrity impact: A successful attack can cause a limited loss.ANoneAvailability impact: No direct loss is represented by this metric.- Post-exploitation / living off the land
- No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Patch available
- Action
- Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
- Workaround
- A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.
04
Evidence and provenance
Published 6 Nov 2019 · Last source change 5 Aug 2024, 00:26 UTC · CWE-305 · Authentication Bypass by Primary Weakness
CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source FIRST · tracked since 2026-09-01
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2019-5959
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD modified after enrichment
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- ENISA EUVD mappingEUVD-2019-5959 was added to the official ENISA EUVD mapping for this CVE.ENISA EUVD ↗
- Before
- not recorded
- After
- {"euvdId":"EUVD-2019-5959"}
- Vendor guidanceAuthoritative vendor guidance changed: added mitigation: samba.org/CVE-2019-14833.html; added patch: bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14833; removed vendor advisory: lists.fedoraproject.org/OKPYHDFI7HRELVXBE5J4MTGSI35AKFBI; removed vendor advisory: lists.fedoraproject.org/UMIYCYXCPRTVCVZ3TP6ZGPJ6RZS3IX4G; 1 further additions; 2 further removals.bugzilla.redhat.com ↗
- Before
- vendor advisory: lists.fedoraproject.org/OKPYHDFI7HRELVXBE5J4MTGSI35AKFBI · vendor advisory: lists.fedoraproject.org/UMIYCYXCPRTVCVZ3TP6ZGPJ6RZS3IX4G · vendor advisory: lists.fedoraproject.org/XQ3IUACPZJXSC4OM6P2V4IC4QMZQZWPD · 1 more references
- After
- mitigation: samba.org/CVE-2019-14833.html · patch: bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14833 · remediation: bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14833
- Affected versionsThe structured affected or fixed version information changed.CNA ↗
- Before
- all versions starting samba 4.5.0 before samba 4.9.15, samba 4.10.10, samba 4.11.2 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
- After
- all versions starting samba 4.5.0 before samba 4.9.15, samba 4.10.10, samba 4.11.2 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
- Remediation statusRemediation status changed from Awaiting fix to Patch available.bugzilla.redhat.com ↗
- Before
- Awaiting fix
- After
- Patch available
- CVSS scoreCVSS score changed from 4.2 (CVSS 3.0 · CNA · CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N) to 5.4 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).NIST NVD ↗
- Before
- 4.2 (CVSS 3.0 · CNA · CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N)
- After
- 5.4 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N)
- Catalogue recordCVE added to the BlackTree catalogue.CNA ↗
CVE published
Fixed release or patch reference recorded
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.