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Vulnerability details: VCID-kz93-hnzv-dyfe
Vulnerability ID VCID-kz93-hnzv-dyfe
Aliases CVE-2021-36740
Summary url request injection
Status Published
Exploitability 0.5
Weighted Severity 7.3
Risk 3.6
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
System Score Found at
cvssv3 8.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-36740.json
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00152 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2021-36740
cvssv3.1 8.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.4 https://nvd.nist.gov/vuln/detail/CVE-2021-36740
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-36740
archlinux Medium https://security.archlinux.org/AVG-2154
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-36740.json
https://api.first.org/data/v1/epss?cve=CVE-2021-36740
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36740
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23959
https://docs.varnish-software.com/security/VSV00007/
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/varnishcache/varnish-cache/commit/82b0a629f60136e76112c6f2c6372cce77b683be
https://github.com/varnishcache/varnish-cache/commit/9be22198e258d0e7a5c41f4291792214a29405cf
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THV2DQA2GS65HUCKK4KSD2XLN3AAQ2V5/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZHBNLDEOTGYRIEQZBWV7F6VPYS4O2AAK/
https://varnish-cache.org/security/VSV00007.html
https://www.debian.org/security/2022/dsa-5088
1982409 https://bugzilla.redhat.com/show_bug.cgi?id=1982409
991040 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991040
ASA-202107-28 https://security.archlinux.org/ASA-202107-28
AVG-2154 https://security.archlinux.org/AVG-2154
cpe:2.3:a:varnish_cache_project:varnish_cache:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:varnish_cache_project:varnish_cache:*:*:*:*:*:*:*:*
cpe:2.3:a:varnish-cache:varnish_cache:6.0.8:r1:*:*:plus:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:varnish-cache:varnish_cache:6.0.8:r1:*:*:plus:*:*:*
cpe:2.3:a:varnish-cache:varnish_cache:6.0.8:r2:*:*:plus:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:varnish-cache:varnish_cache:6.0.8:r2:*:*:plus:*:*:*
cpe:2.3:a:varnish-cache:varnish_cache:*:*:*:*:plus:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:varnish-cache:varnish_cache:*:*:*:*:plus:*:*:*
cpe:2.3:a:varnish-software:varnish_cache:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:varnish-software:varnish_cache:*:*:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_cache:*:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:varnish-software:varnish_cache:*:*:*:*:lts:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CVE-2021-36740 https://nvd.nist.gov/vuln/detail/CVE-2021-36740
RHSA-2021:2988 https://access.redhat.com/errata/RHSA-2021:2988
RHSA-2021:2993 https://access.redhat.com/errata/RHSA-2021:2993
USN-5474-1 https://usn.ubuntu.com/5474-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-36740.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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H 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: AV:N/AC:L/Au:N/C:P/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-36740
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-36740
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
Exploit Prediction Scoring System (EPSS)
Percentile 0.36894
EPSS Score 0.00152
Published At July 4, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T11:54:23.044563+00:00 Arch Linux Importer Import https://security.archlinux.org/AVG-2154 36.1.3