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CVE-2019-12435

23
FAUCET Score

CVE-2019-12435 is a NULL pointer dereference vulnerability in Samba 4.9.x before 4.9.9 and 4.10.x before 4.10.5, specifically affecting the AD DC DNS management server RPC process. This flaw can lead to a Denial of Service (DoS) with a CVSS score of 6.5 (Medium), indicating it can be exploited remotely with low attack complexity by a low-privileged attacker. There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. However, the vulnerability has garnered some community discussion and media coverage, including an article from BleepingComputer.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.9.0, < 4.9.9CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 4.10.0, < 4.10.5CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.18%
Probability of exploitation in next 30 days
EPSS Percentile
80.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0218 is in the 92nd percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2019-12435Moderate

samba: AD DC Denial of Service in DNS management server

Jun 19, 2019

References

lists.opensuse.org / opensuse-security-announce/2019-07/msg00023.html
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/QSG3TLPZP35RH5DWAIDC7MHXRK5DFKOE
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ZQ3LCJNJ3ONHIRKDSKOTT6QGXALLCHVG
usn.ubuntu.com / 4018-1
samba.org / samba/security/CVE-2019-12435.html
Vendor Advisory
synology.com / security/advisory/Synology_SA_19_27
securityfocus.com / bid/108825