CVE-2019-5436

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.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total 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

49.74% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 98.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Low. 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

2019-05-28 18:47Z7 YR AGO

Last updated

2026-04-15 20:51Z4 MO AGO

Reserved

2019-01-04

Assigning CNA

hackerone

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

c56ec610b062c6c1b49246ba26a3f7f81120bfb896cc8182a08f3ad5b6e58e1f

• lists.opensuse.orgopenSUSE-SU-2019:1492http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00008.htmlvendor-advisoryx_refsource_SUSE
• lists.opensuse.orgopenSUSE-SU-2019:1508http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00017.htmlvendor-advisoryx_refsource_SUSE
• lists.fedoraproject.orgFEDORA-2019-697de0501fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SMG3V4VTX2SE3EW3HQTN3DDLQBTORQC2/vendor-advisoryx_refsource_FEDORA
• www.openwall.com[oss-security] 20190911 [SECURITY ADVISORY] curl: TFTP small blocksize heap buffer overflowhttp://www.openwall.com/lists/oss-security/2019/09/11/6mailing-listx_refsource_MLIST
• www.debian.orgDSA-4633https://www.debian.org/security/2020/dsa-4633vendor-advisoryx_refsource_DEBIAN
• seclists.org20200225 [SECURITY] [DSA 4633-1] curl security updatehttps://seclists.org/bugtraq/2020/Feb/36mailing-listx_refsource_BUGTRAQ
• security.gentoo.orgGLSA-202003-29https://security.gentoo.org/glsa/202003-29vendor-advisoryx_refsource_GENTOO
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2020.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2020.htmlx_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20190606-0004/x_refsource_CONFIRM
• curl.haxx.sehttps://curl.haxx.se/docs/CVE-2019-5436.htmlx_refsource_CONFIRM
• support.f5.comhttps://support.f5.com/csp/article/K55133295x_refsource_CONFIRM
• support.f5.comhttps://support.f5.com/csp/article/K55133295?utm_source=f5support&amp%3Butm_medium=RSSx_refsource_CONFIRM