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Vulnerability details: VCID-jqqf-gmd3-ubcd
Vulnerability ID VCID-jqqf-gmd3-ubcd
Aliases CVE-2016-8621
Summary Multiple vulnerabilities have been found in cURL, the worst of which could allow remote attackers to execute arbitrary code.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-125 Out-of-bounds Read
CWE-126 Buffer Over-read
System Score Found at
cvssv3 5.3 https://access.redhat.com/errata/RHSA-2018:2486
ssvc Track https://access.redhat.com/errata/RHSA-2018:2486
cvssv3 5.3 https://access.redhat.com/errata/RHSA-2018:3558
ssvc Track https://access.redhat.com/errata/RHSA-2018:3558
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-8621.json
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.0226 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.02369 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.03165 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.03233 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.03233 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
epss 0.03233 https://api.first.org/data/v1/epss?cve=CVE-2016-8621
cvssv3 5.3 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8621
ssvc Track https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8621
cvssv3 5.3 https://curl.haxx.se/CVE-2016-8621.patch
ssvc Track https://curl.haxx.se/CVE-2016-8621.patch
cvssv3 5.3 https://curl.haxx.se/docs/adv_20161102G.html
ssvc Track https://curl.haxx.se/docs/adv_20161102G.html
cvssv3.1 Medium https://curl.se/docs/CVE-2016-8621.html
cvssv2 6.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
archlinux High https://security.archlinux.org/AVG-60
archlinux High https://security.archlinux.org/AVG-61
archlinux High https://security.archlinux.org/AVG-62
archlinux High https://security.archlinux.org/AVG-63
archlinux High https://security.archlinux.org/AVG-65
archlinux High https://security.archlinux.org/AVG-66
cvssv3 5.3 https://security.gentoo.org/glsa/201701-47
ssvc Track https://security.gentoo.org/glsa/201701-47
cvssv3 5.3 https://www.tenable.com/security/tns-2016-21
ssvc Track https://www.tenable.com/security/tns-2016-21
cvssv3 5.3 http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
ssvc Track http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
cvssv3 5.3 http://www.securityfocus.com/bid/94101
ssvc Track http://www.securityfocus.com/bid/94101
cvssv3 5.3 http://www.securitytracker.com/id/1037192
ssvc Track http://www.securitytracker.com/id/1037192
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-8621.json
https://api.first.org/data/v1/epss?cve=CVE-2016-8621
https://curl.se/docs/CVE-2016-8621.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8615
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8616
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8617
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8618
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8619
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8620
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8621
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8622
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8623
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8624
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1037192 http://www.securitytracker.com/id/1037192
1388385 https://bugzilla.redhat.com/show_bug.cgi?id=1388385
94101 http://www.securityfocus.com/bid/94101
adv_20161102G.html https://curl.haxx.se/docs/adv_20161102G.html
ASA-201611-10 https://security.archlinux.org/ASA-201611-10
ASA-201611-4 https://security.archlinux.org/ASA-201611-4
ASA-201611-5 https://security.archlinux.org/ASA-201611-5
ASA-201611-7 https://security.archlinux.org/ASA-201611-7
ASA-201611-8 https://security.archlinux.org/ASA-201611-8
ASA-201611-9 https://security.archlinux.org/ASA-201611-9
AVG-60 https://security.archlinux.org/AVG-60
AVG-61 https://security.archlinux.org/AVG-61
AVG-62 https://security.archlinux.org/AVG-62
AVG-63 https://security.archlinux.org/AVG-63
AVG-65 https://security.archlinux.org/AVG-65
AVG-66 https://security.archlinux.org/AVG-66
CVE-2016-8621.patch https://curl.haxx.se/CVE-2016-8621.patch
GLSA-201701-47 https://security.gentoo.org/glsa/201701-47
show_bug.cgi?id=CVE-2016-8621 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8621
USN-3123-1 https://usn.ubuntu.com/3123-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/errata/RHSA-2018:2486
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T13:33:21Z/ Found at https://access.redhat.com/errata/RHSA-2018:2486
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/errata/RHSA-2018:3558
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T13:33:21Z/ Found at https://access.redhat.com/errata/RHSA-2018:3558
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-8621.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8621
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T13:33:21Z/ Found at https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8621
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://curl.haxx.se/CVE-2016-8621.patch
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T13:33:21Z/ Found at https://curl.haxx.se/CVE-2016-8621.patch
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://curl.haxx.se/docs/adv_20161102G.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T13:33:21Z/ Found at https://curl.haxx.se/docs/adv_20161102G.html
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://security.gentoo.org/glsa/201701-47
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T13:33:21Z/ Found at https://security.gentoo.org/glsa/201701-47
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://www.tenable.com/security/tns-2016-21
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T13:33:21Z/ Found at https://www.tenable.com/security/tns-2016-21
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T13:33:21Z/ Found at http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at http://www.securityfocus.com/bid/94101
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T13:33:21Z/ Found at http://www.securityfocus.com/bid/94101
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at http://www.securitytracker.com/id/1037192
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-16T13:33:21Z/ Found at http://www.securitytracker.com/id/1037192
Exploit Prediction Scoring System (EPSS)
Percentile 0.84539
EPSS Score 0.0226
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:00:44.682577+00:00 Gentoo Importer Import https://security.gentoo.org/glsa/201701-47 38.0.0