CVE-2019-3859

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

6.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 93.4% of scored records. A rank, not a probability.

NVD base score

9.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2019-03-20 21:18Z7 YR AGO

Last updated

2026-10-14 06:35Z15 DAYS AGO

Reserved

2019-01-03

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Medium (CVSS 5.0)

CNA CVSS vector

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

Weaknesses

• CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

762151076f88971ed4780474c792e2b36d20657468159564092bf6c1f820b692

• www.openwall.com[oss-security] 20190318 [SECURITY ADVISORIES] libssh2http://www.openwall.com/lists/oss-security/2019/03/18/3mailing-listx_refsource_MLIST
• seclists.org20190319 [slackware-security] libssh2 (SSA:2019-077-01)https://seclists.org/bugtraq/2019/Mar/25mailing-listx_refsource_BUGTRAQ
• www.libssh2.orghttps://www.libssh2.org/CVE-2019-3859.htmlx_refsource_MISC
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3859x_refsource_CONFIRM
• packetstormsecurity.comhttp://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.htmlx_refsource_MISC
• www.securityfocus.com107485http://www.securityfocus.com/bid/107485vdb-entryx_refsource_BID
• lists.fedoraproject.orgFEDORA-2019-f31c14682fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/vendor-advisoryx_refsource_FEDORA
• www.broadcom.comhttps://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767x_refsource_CONFIRM
• lists.debian.org[debian-lts-announce] 20190326 [SECURITY] [DLA 1730-1] libssh2 security updatehttps://lists.debian.org/debian-lts-announce/2019/03/msg00032.htmlmailing-listx_refsource_MLIST
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20190327-0005/x_refsource_CONFIRM
• lists.opensuse.orgopenSUSE-SU-2019:1075http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.htmlvendor-advisoryx_refsource_SUSE
• lists.debian.org[debian-lts-announce] 20190402 [SECURITY] [DLA 1730-2] libssh2 regression updatehttps://lists.debian.org/debian-lts-announce/2019/04/msg00006.htmlmailing-listx_refsource_MLIST
• lists.opensuse.orgopenSUSE-SU-2019:1109http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.htmlvendor-advisoryx_refsource_SUSE
• lists.fedoraproject.orgFEDORA-2019-3348cb4934https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/vendor-advisoryx_refsource_FEDORA
• www.debian.orgDSA-4431https://www.debian.org/security/2019/dsa-4431vendor-advisoryx_refsource_DEBIAN
• seclists.org20190415 [SECURITY] [DSA 4431-1] libssh2 security updatehttps://seclists.org/bugtraq/2019/Apr/25mailing-listx_refsource_BUGTRAQ
• lists.opensuse.orgopenSUSE-SU-2019:1290http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.htmlvendor-advisoryx_refsource_SUSE
• lists.opensuse.orgopenSUSE-SU-2019:1291http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00103.htmlvendor-advisoryx_refsource_SUSE
• lists.debian.org[debian-lts-announce] 20190725 [SECURITY] [DLA 1730-3] libssh2 regression updatehttps://lists.debian.org/debian-lts-announce/2019/07/msg00024.htmlmailing-listx_refsource_MLIST
• www.oracle.comhttps://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.htmlx_refsource_MISC
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html