Samba: group policy certificate enrollment uses http:// without validation
Noroxi assessment
Priority: Monitor (action score 27/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
- Someone on the same network segment can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
- Fixed version: ldb-tools (AlmaLinux:10) 4.23.5-109.el10_2; libldb (AlmaLinux:10) 4.23.5-109.el10_2; libldb-devel (AlmaLinux:10) 4.23.5-109.el10_2.
Low priority for now. Upgrade to ldb-tools (AlmaLinux:10) 4.23.5-109.el10_2; libldb (AlmaLinux:10) 4.23.5-109.el10_2; libldb-devel (AlmaLinux:10) 4.23.5-109.el10_2 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.
- BDU:2026-07422
- ALSA-2026:22644
- ALSA-2026:22963
- ALSA-2026:25049
- openSUSE-SU-2026:10884-1
- openSUSE-SU-2026:20905-1
- openSUSE-SU-2026:21540-1
- RHSA-2026:22644
- RHSA-2026:22963
- RHSA-2026:25049
- RHSA-2026:25979
- RHSA-2026:28053
- RHSA-2026:28054
- RHSA-2026:28055
- RHSA-2026:28056
- RHSA-2026:28057
- RLSA-2026:22644
- RLSA-2026:22963
- RLSA-2026:25049
- SUSE-SU-2026:22045-1
- Published
- May 27, 2026
- Updated
- Oct 8, 2026
- EPSS
- 0.2% · 12th percentile
- CWE
- CWE-345
Report tools
Action score
27
Monitor
Low priority for now.
- CVSS
- 27 / 40 · 6.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 6.8
- CNA · redhat
- 8.0
- 1.2 point gap
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| samba | samba | cpe:2.3:a:samba:samba |
| redhat | openshift container platform | cpe:2.3:a:redhat:openshift_container_platform |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- redhat enterprise linux7.0
- redhat enterprise linux9.0
- redhat openshift container platform4.0
- samba samba4.16.0 and later · before 4.21.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
Red Hat Red Hat Enterprise Linux 10
- 0:4.23.5-109.el10_2 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
- 0:4.21.3-114.el10_0.1 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 6
- all versionsunknown
- all versionsunknown
Red Hat Red Hat Enterprise Linux 7
- all versionsaffected
Red Hat Red Hat Enterprise Linux 8
- 0:4.19.4-16.el8_10 and laternot affected · rpm
- 0:4.19.4-16.el8_10 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
- 0:4.15.5-16.el8_6.1 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
- 0:4.15.5-16.el8_6.1 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
- 0:4.17.5-7.el8_8.1 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
- 0:4.17.5-7.el8_8.1 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 9
- 0:4.23.5-10.el9_8 and laternot affected · rpm
- 0:4.23.5-10.el9_8 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- 0:4.17.5-105.el9_2.5 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
- 0:4.19.4-105.el9_4.4 and laternot affected · rpm
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | ldb-tools | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | libldb | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | libldb-devel | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | libnetapi | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | libnetapi-devel | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | libsmbclient | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | libsmbclient-devel | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | libwbclient | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | libwbclient-devel | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | python3-ldb | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | python3-samba | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | python3-samba-dc | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | python3-samba-test | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba-client | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba-client-libs | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba-common | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba-common-libs | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba-common-tools | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba-dc-libs | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba-dcerpc | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba-devel | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba-gpupdate | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
| AlmaLinux:10 | samba-krb5-printing | before 4.23.5-109.el10_2 | 4.23.5-109.el10_2 |
+96
Same product
samba: all recordsOther highest-scoring records for the same primary product.
- CVE-2017-7494Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allowing a malicious cliKEV99Now
- CVE-2015-0240The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x before 4.0.25, 4.1.x before 4.1.17, and 4.2.x befor66This week
- CVE-2003-0085Buffer overflow in the SMB/CIFS packet fragment re-assembly code for SMB daemon (smbd) in Samba before 2.2.8, and Samba-TNG before 0.3.1, al66This week
- CVE-2003-0201Buffer overflow in the call_trans2open function in trans2.c for Samba 2.2.x before 2.2.8a, 2.0.10 and earlier 2.0.x versions, and Samba-TNG 65This week
- CVE-2007-2446Multiple heap-based buffer overflows in the NDR parsing in smbd in Samba 3.0.0 through 3.0.25rc3 allow remote attackers to execute arbitrary63This week
- CVE-2012-1182The RPC code generator in Samba 3.x before 3.4.16, 3.5.x before 3.5.14, and 3.6.x before 3.6.4 does not implement validation of an array len62This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:ctdb | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libnetapi | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libnetapi-devel | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libsmbclient | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libsmbclient-devel | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libwbclient | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libwbclient-devel | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python3-samba | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python3-samba-dc | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python3-samba-devel | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python3-samba-test | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:samba | 4.19.4-16.el8_10 · AlmaLinux:8 | Package registry (OSV) |
| alpine:samba | 4.22.10-r0 · Alpine:v3.23 | Package registry (OSV) |
| debian:samba | 2:4.17.12+dfsg-0+deb12u4 · Debian:12 | Package registry (OSV) |
| opensuse:samba | 4.23.8+git.477.f78166bceed-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:ctdb-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libnetapi-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libsmbclient-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libwbclient-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:python3-samba-dc-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:python3-samba-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:samba-client-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:samba-client-libs-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:samba-common-libs-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:samba-common-tools-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:samba-dc-libs-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:samba-dcerpc-debuginfo | 0:4.19.4-16.el8_10 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| rocky linux:samba | 0:4.19.4-16.el8_10 · Rocky Linux:8 | Package registry (OSV) |
| suse:samba | 4.22.9+git.506.22c03ce0781-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone on the same network segment can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- none
- Attack vector
- Adjacent
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-345 · Insufficient Verification of Data AuthenticityCVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- JSON Hijacking (aka JavaScript Hijacking)CAPEC-111likelihood: High · High
- Cache PoisoningCAPEC-141likelihood: High · High
- DNS Cache PoisoningCAPEC-142likelihood: High · High
- Content SpoofingCAPEC-148likelihood: Medium · Medium
- Spoofing of UDDI/ebXML MessagesCAPEC-218Medium
- Application API Message Manipulation via Man-in-the-MiddleCAPEC-384Low
- Transaction or Event Tampering via Application API ManipulationCAPEC-385Medium
- Application API Navigation RemappingCAPEC-386Medium
Change log
- Fix✗ → ✓
- SSVC exploitation— → none
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- access.redhat.com/errata/RHSA-2026:22963
- access.redhat.com/errata/RHSA-2026:25049
- access.redhat.com/errata/RHSA-2026:25979
- access.redhat.com/errata/RHSA-2026:28053
- access.redhat.com/errata/RHSA-2026:28054
- access.redhat.com/errata/RHSA-2026:28055
- access.redhat.com/errata/RHSA-2026:28056
- access.redhat.com/errata/RHSA-2026:28057
- access.redhat.com/errata/RHSA-2026:29863
- access.redhat.com/errata/RHSA-2026:56786
- access.redhat.com/errata/RHSA-2026:56853
- access.redhat.com/errata/RHSA-2026:56911
- access.redhat.com/errata/RHSA-2026:57483
- access.redhat.com/errata/RHSA-2026:59831
- access.redhat.com/errata/RHSA-2026:60019
- access.redhat.com/errata/RHSA-2026:62409
- access.redhat.com/errata/RHSA-2026:62549
- access.redhat.com/errata/RHSA-2026:65839
- access.redhat.com/errata/RHSA-2026:65851
Vendor advisories and official records. Exploit/PoC links are deliberately left out.