Back
CVE-2016-2110
The NTLMSSP authentication implementation in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 allows…
- 5.9MediumCVSS base score
- 8.3%Exploitation in 30 daysEPSS · top 5.0% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The NTLMSSP authentication implementation in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 allows man-in-the-middle attackers to perform protocol-downgrade attacks by modifying the client-server data stream to remove application-layer flags or encryption settings, as demonstrated by clearing the NTLMSSP_NEGOTIATE_SEAL or NTLMSSP_NEGOTIATE_SIGN option to disrupt LDAP security.
Timeline
ID reserved
By redhat
- 3 months later
· 3 months later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 8.3% · top 5.0% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Affected products
n/a
- affected n/a
References
42
- SSA:2016-106-02 (opens in a new tab)vendor-advisoryx_refsource_SLACKWAREx_transferred
- SUSE-SU-2016:1022 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- RHSA-2016:0612 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- openSUSE-SU-2016:1440 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- USN-2950-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- SUSE-SU-2016:1028 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- RHSA-2016:0613 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- http://badlock.org/ (opens in a new tab)x_refsource_MISCx_transferred
- RHSA-2016:0621 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2016:1064 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- USN-2950-5 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://www.samba.org/samba/history/samba-4.2.10.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2016-be53260726 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- RHSA-2016:0624 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2016:0618 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- SUSE-SU-2016:1024 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- SUSE-SU-2016:1023 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://www.samba.org/samba/latest_news.html#4.4.2 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1035533 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- FEDORA-2016-48b3761baa (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- SUSE-SU-2016:1105 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- RHSA-2016:0614 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- openSUSE-SU-2016:1025 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- RHSA-2016:0620 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2016:0611 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- openSUSE-SU-2016:1106 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://bto.bluecoat.com/security-advisory/sa122 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2950-3 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- FEDORA-2016-383fce04e2 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- openSUSE-SU-2016:1107 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://www.samba.org/samba/security/CVE-2016-2110.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2016:0619 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05082964 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c05087821 (opens in a new tab)x_refsource_CONFIRMx_transferred
- GLSA-201612-47 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- DSA-3548 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- RHSA-2016:0623 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- USN-2950-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- RHSA-2016:0625 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05162399 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2950-4 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2016-3213 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-2110)Record last updated .