CVE-2019-14907

All samba versions 4.9.x before 4.9.18, 4.10.x before 4.10.12 and 4.11.x before 4.11.5 have an issue where if it is set with "log level = 3" (or above) then the string obtained from the client, after a failed character conversion, is printed. Such strings can be provided during the NTLMSSP authentication exchange. In the Samba AD DC in particular, this may cause a long-lived process(such as the RPC server) to terminate. (In the file server case, the most likely target, smbd, operates as process-per-client and so a crash there is harmless).

Published: 2020-01-21 Last update: 2025-01-14 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-14907 is rated Moderate Risk (62.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 10.24%, 93th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +4.44% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-14907

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-12-28 5.81% 10.24% +4.44%
2 2025-12-27 10.24% 5.81% -4.44%
3 2025-11-30 — 10.24% —

Full EPSS history (24 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-14907

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
2.6 2.0 LOW
AV:N/AC:H/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 4.9 2.9 [email protected]

Weakness enumeration for CVE-2019-14907

OS Trackers for CVE-2019-14907

vendor priority summary link
alpine — CVE-2019-14907: 1 source package rows (samba); 35 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 25. https://security.alpinelinux.org/vuln/CVE-2019-14907
debian not yet assigned CVE-2019-14907 not yet assigned priority: Debian including 1 source packages (samba), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-14907
gentoo normal CVE-2019-14907: 1 GLSA(s) (202003-52), 1 atom(s) (net-fs/samba); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2019-14907
redhat medium — https://access.redhat.com/security/cve/CVE-2019-14907
suse medium CVE-2019-14907 severity moderate: SUSE including 1103 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 2222 product×package rows across 88 product lines (HPE Helion OpenStack 8, Image SLES12-SP5-Azure-BYOS, … (88 product lines)): Fixed 1797, Known Not Affected 268, Known Affected 157. https://www.suse.com/security/cve/CVE-2019-14907/
ubuntu low CVE-2019-14907 low priority: Ubuntu including 1 source packages (samba), 18 status rows across 18 suites (bionic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 17, needed 1. https://ubuntu.com/security/CVE-2019-14907

Affected software / configurations for CVE-2019-14907

Vendor Product Version Raw CPE
samba samba >= 4.9.0, < 4.9.18 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
samba samba >= 4.10.0, < 4.10.12 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
samba samba >= 4.11.0, < 4.11.5 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
fedoraproject fedora 30 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
fedoraproject fedora 31 cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
redhat storage 3.0 cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:*
redhat enterprise_linux 7.0 cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
redhat enterprise_linux 8.0 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 19.04 cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
canonical ubuntu_linux 19.10 cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
synology directory_server — cpe:2.3:a:synology:directory_server:-:*:*:*:*:*:*:*
synology router_manager 1.2 cpe:2.3:a:synology:router_manager:1.2:*:*:*:*:*:*:*
synology skynas — cpe:2.3:a:synology:skynas:-:*:*:*:*:*:*:*
synology diskstation_manager 6.2 cpe:2.3:o:synology:diskstation_manager:6.2:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

References for CVE-2019-14907

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00055.html Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14907 Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00013.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ACZVNMIFQGGXNJPMHAVBN3H2U65FXQY/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GQ6U65I2K23YJC4FESW477WL55TU3PPT/
https://security.gentoo.org/glsa/202003-52 Third Party Advisory
https://security.netapp.com/advisory/ntap-20200122-0001/ Third Party Advisory
https://usn.ubuntu.com/4244-1/ Third Party Advisory
https://www.samba.org/samba/security/CVE-2019-14907.html Vendor Advisory
https://www.synology.com/security/advisory/Synology_SA_20_01 Third Party Advisory
cvelogic Threat Intelligence