THREATPORT/VULNERABILITY/CVE-2019-5436
HIGH SEVERITY

CVE-2019-5436

Libcurl vulnerability

CVSS
7.8
EPSS
49.7%
EPSS pct
99th
Exploited
No known
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.
Affected vendor
Haxx
Affected product
Libcurl
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2019-05-28

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable with local access, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 49.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2019-5436

  • Confirm whether Haxx Libcurl is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-5436.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-5436

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-5436 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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