CVE-2016-9586

22

FAUCET Score

CVE-2016-9586 describes a buffer overflow vulnerability in curl versions prior to 7.52.0, specifically within libcurl's printf() functions when handling large floating-point output. This flaw could allow remote attackers to execute arbitrary code if an application accepts unfiltered format strings from external sources. With a CVSS score of 8.1 (HIGH), this vulnerability presents a significant risk, enabling high impact to confidentiality, integrity, and availability with high attack complexity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 7.52.0CPE matchmatch criteria	cpe:2.3:a:haxx:curl::::::::

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

2.2

Impact Score

3.6

CvssVersion

3.0

Exploit Intelligence

EPSS Score

4.93%

Probability of exploitation in next 30 days

EPSS Percentile

91.2%

Percentile rank of EPSS score among Peer Group

As of 2026-07-25

Model: v2026.06.15

This CVE's current EPSS score of 0.0493 is in the 58th percentile among its peer group of 8,914 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (23)

github_advisorypatch availablevia nvd_reference

jitsipatch availablevia llm_extracted

Fixed in: 7.51.0

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: httpd24-curl-0:7.61.1-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: httpd24-nghttp2-0:1.7.1-7.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: httpd24-curl-0:7.61.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: httpd24-httpd-0:2.4.34-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: httpd24-nghttp2-0:1.7.1-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: httpd24-curl-0:7.61.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: httpd24-httpd-0:2.4.34-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: httpd24-nghttp2-0:1.7.1-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: httpd24-curl-0:7.61.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: httpd24-httpd-0:2.4.34-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: httpd24-nghttp2-0:1.7.1-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: httpd24-curl-0:7.61.1-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: httpd24-httpd-0:2.4.34-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: httpd24-nghttp2-0:1.7.1-7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: httpd24-httpd-0:2.4.34-7.el6

sierra_wirelesspatch availablevia llm_extracted

Fixed in: 7.51.0

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 5Fixed in: curl

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 6Fixed in: curl

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: curl

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Virtualization 3Fixed in: mingw-virt-viewer

redhatend of lifevia redhat_api

Product: .NET Core 2.1 on Red Hat Enterprise LinuxFixed in: rh-dotnet21-curl

Vendor Advisories (3)

redhatCVE-2016-9586Low

curl: printf floating point buffer overflow

sierra_wirelessllm-sierra_wireless-6688ff13360ed26bMEDIUM

printf floating point buffer overflow

jitsillm-jitsi-afb7993d5256c982MEDIUM

printf floating point buffer overflow

References

access.redhat.com / errata/RHSA-2018:3558

bugzilla.redhat.com / show_bug.cgi

Issue TrackingThird Party Advisory

curl.haxx.se / docs/adv_20161221A.html

Vendor Advisory

github.com / curl/curl/commit/curl-7_51_0-162-g3ab3c16

PatchThird Party Advisory

lists.apache.org / thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

lists.apache.org / thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

lists.debian.org / debian-lts-announce/2018/11/msg00005.html

security.gentoo.org / glsa/201701-47

Third Party Advisory

oracle.com / technetwork/security-advisory/cpuoct2018-4428296.html

securityfocus.com / bid/95019

Third Party AdvisoryVDB Entry

securitytracker.com / id/1037515

Third Party AdvisoryVDB Entry