Vulnerability · CVE-2019-5436
A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1.
Published May 28, 2019 · catalog updated Oct 14, 2026 · A heap buffer overflow
Check this week
CVE-2019-5436 is not in CISA KEV. FIRST estimates a 49.74% chance of exploitation in the next 30 days. Check whether you run A heap buffer overflow.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (A heap buffer overflow).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 49.74%
- Remediation
- Advisory link
- Affected products
- cpe debian/debian linux · cpe f5/traffix signaling delivery controller · cpe fedoraproject/fedora · cpe haxx/libcurl · cpe netapp/hci management node · cpe opensuse/leap
A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe debian/debian linux10.0
- cpe debian/debian linux9.0
- cpe f5/traffix signaling delivery controllerversion unspecified
- cpe fedoraproject/fedora29
- cpe haxx/libcurlversion unspecified
- cpe netapp/hci management nodeversion unspecified
- cpe opensuse/leap15.0
- cpe opensuse/leap15.1
- cpe opensuse/leap42.3
- cpe oracle/enterprise manager ops center12.3.3
How to fix CVE-2019-5436
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2019-5436 is not in CISA KEV. FIRST estimates a 49.74% chance of exploitation in the next 30 days. Check whether you run A heap buffer overflow.
Which versions are affected?
Compare what you have installed with debian/debian linux 10.0; debian/debian linux 9.0; oracle/enterprise manager ops center 12.3.3. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-122: Heap-based Buffer Overflow; CWE-787: Out-of-bounds Write. EPSS 49.74%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
May 28, 2019 · NIST NVD
Detected
A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1.
Oct 14, 2026 · NIST NVD
Updated
A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1.
Sources
- CVE.orgVulnerability recordCVE-2019-5436
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2019-5436
30-day exploitation probability 49.7%
first.org - NIST NVDVulnerability recordCVE-2019-5436
A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1.
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.