All vulnerabilities

Servers and applications

CVE-2018-1139

A flaw was found in the way samba before 4.7.9 and 4.8.4 allowed the use of weak NTLMv1 authentication even when NTLMv1 was explicitly disabled. A man-in-the-middle attacker could use this flaw to read the credential and other details passed between the samba server and client.

Severity
High 8.1
Published
22 Aug 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.7.9, 4.8.4
Exploit chance
3.1% in the next 30 daysHigher than 87% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
SambaServers and applications · cpe:a:samba:samba
  • From 4.7.0 before 4.7.9
  • From 4.8.0 before 4.8.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-1139
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-1139