CVE-2019-5436

46

FAUCET Score

CVE-2019-5436 describes a heap buffer overflow vulnerability in the TFTP receiving code of libcurl versions 7.19.4 through 7.64.1, impacting various products including Debian, F5, and Oracle. With a CVSS score of 7.8 (High), this flaw allows for denial-of-service or arbitrary code execution, requiring local access and low privileges. Despite its severity, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 7.19.4, <= 7.64.1CPE matchmatch criteria	cpe:2.3:a:haxx:libcurl::::::::
		15.0CPE matchmatch criteria	cpe:2.3:o:opensuse:leap:15.0:::::::*
		15.1CPE matchmatch criteria	cpe:2.3:o:opensuse:leap:15.1:::::::*
		42.3CPE matchmatch criteria	cpe:2.3:o:opensuse:leap:42.3:::::::*
		29CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:29:::::::*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

1.8

Impact Score

5.9

CvssVersion

3.1

Exploit Intelligence

EPSS Score

49.74%

Probability of exploitation in next 30 days

EPSS Percentile

98.8%

Percentile rank of EPSS score among Peer Group

As of 2026-07-24

Model: v2026.06.15

This CVE's current EPSS score of 0.4974 is in the 100th percentile among its peer group of 16,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (11)

hikvisionpatch availablevia llm_extracted

oraclepatch availablevia nvd_reference

redhatpatch availablevia redhat_api

Product: Red Hat Ansible Tower 3.6 for RHEL 7Fixed in: ansible-tower-36/ansible-tower:3.6.4-1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: curl-0:7.29.0-57.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.7 Extended Update SupportFixed in: curl-0:7.29.0-54.el7_7.3

redhatpatch availablevia redhat_api

Product: JBoss Core Services Apache HTTP Server 2.4.29 SP2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: curl-0:7.61.1-12.el8

redhatpatch availablevia redhat_api

Product: Red Hat Ansible Tower 3.5 for RHEL 7Fixed in: ansible-tower-35/ansible-tower:3.5.6-1

redhatvendor investigatingvia redhat_api

Product: Red Hat Software CollectionsFixed in: httpd24-curl

redhatno patchvia redhat_api

Product: Red Hat JBoss Core ServicesFixed in: jbcs-httpd24-curl

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 6Fixed in: curl

Vendor Advisories (2)

redhatCVE-2019-5436Low

curl: TFTP receive heap buffer overflow in tftp_receive_packet() function

hikvisionllm-hikvision-3fa13aeb9e3c233aLOW

TFTP receive buffer overflow

References

lists.opensuse.org / opensuse-security-announce/2019-06/msg00008.html

Mailing ListThird Party Advisory

lists.opensuse.org / opensuse-security-announce/2019-06/msg00017.html

Mailing ListThird Party Advisory

curl.haxx.se / docs/CVE-2019-5436.html

ExploitPatchVendor Advisory

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/SMG3V4VTX2SE3EW3HQTN3DDLQBTORQC2

seclists.org / bugtraq/2020/Feb/36

Mailing ListThird Party Advisory

security.gentoo.org / glsa/202003-29

Third Party Advisory

security.netapp.com / advisory/ntap-20190606-0004

Third Party Advisory

support.f5.com / csp/article/K55133295

Third Party Advisory

support.f5.com / csp/article/K55133295

debian.org / security/2020/dsa-4633

Third Party Advisory

oracle.com / security-alerts/cpuapr2020.html

Third Party Advisory

oracle.com / security-alerts/cpuoct2020.html

oracle.com / technetwork/security-advisory/cpuoct2019-5072832.html

PatchThird Party Advisory

openwall.com / lists/oss-security/2019/09/11/6

Mailing ListPatchThird Party Advisory