Search for vulnerabilities
Vulnerability details: VCID-ugjs-k8a1-sue3
Vulnerability ID VCID-ugjs-k8a1-sue3
Aliases CVE-2021-37750
Summary The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server field.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-476 NULL Pointer Dereference
System Score Found at
cvssv3 6.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-37750.json
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
epss 0.00454 https://api.first.org/data/v1/epss?cve=CVE-2021-37750
cvssv3.1 6.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.0 https://nvd.nist.gov/vuln/detail/CVE-2021-37750
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-37750
archlinux Medium https://security.archlinux.org/AVG-2312
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-37750.json
https://api.first.org/data/v1/epss?cve=CVE-2021-37750
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-37750
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49
https://github.com/krb5/krb5/releases
https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/
https://security.netapp.com/advisory/ntap-20210923-0002/
https://www.oracle.com/security-alerts/cpujul2022.html
https://www.starwindsoftware.com/security/sw-20220817-0004/
1996834 https://bugzilla.redhat.com/show_bug.cgi?id=1996834
992607 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=992607
AVG-2312 https://security.archlinux.org/AVG-2312
cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:22.1.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:22.1.0:*:*:*:*:*:*:*
cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8r13:14338:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8r13:14338:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
CVE-2021-37750 https://nvd.nist.gov/vuln/detail/CVE-2021-37750
RHSA-2021:3576 https://access.redhat.com/errata/RHSA-2021:3576
RHSA-2021:4788 https://access.redhat.com/errata/RHSA-2021:4788
USN-5959-1 https://usn.ubuntu.com/5959-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-37750.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:L/PR:L/UI:N/S:U/C:N/I:N/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:S/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-37750
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:L/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-37750
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 0.62848
EPSS Score 0.00454
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:34:13.417666+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.16/main.json 37.0.0