CVE-2022-37966 | Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability

Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability

Published: 2022-11-09 Last update: 2025-01-02 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-37966 is rated Moderate Risk (63.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.77%). EPSS rose +1.39% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-37966

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.38% 2.77% +1.39%
2 2025-12-30 1.04% 1.38% +0.34%
3 2025-11-21 — 1.04% —

Full EPSS history (43 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-37966

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]

Weakness enumeration for CVE-2022-37966

OS Trackers for CVE-2022-37966

vendor priority summary link
debian not yet assigned CVE-2022-37966 not yet assigned priority: Debian including 1 source packages (samba), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2022-37966
gentoo high CVE-2022-37966: 1 GLSA(s) (202309-06), 1 atom(s) (net-fs/samba); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-37966
redhat high — https://access.redhat.com/security/cve/CVE-2022-37966
suse high — https://www.suse.com/security/cve/CVE-2022-37966/
ubuntu medium CVE-2022-37966 medium priority: Ubuntu including 1 source packages (samba), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 10, ignored 2, needed 1. https://ubuntu.com/security/CVE-2022-37966

Affected software / configurations for CVE-2022-37966

Vendor Product Version Raw CPE
microsoft windows_server_2008 — cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
microsoft windows_server_2008 r2 cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
microsoft windows_server_2012 — cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
microsoft windows_server_2012 r2 cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
microsoft windows_server_2016 — cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
microsoft windows_server_2019 — cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
microsoft windows_server_2022 — cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*
fedoraproject fedora 36 cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
fedoraproject fedora 37 cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
netapp management_services_for_element_software — cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:*
netapp management_services_for_netapp_hci — cpe:2.3:a:netapp:management_services_for_netapp_hci:-:*:*:*:*:*:*:*
samba samba < 4.15.13 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
samba samba >= 4.16.0, < 4.16.8 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
samba samba >= 4.17.0, < 4.17.4 cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*

References for CVE-2022-37966

cvelogic Threat Intelligence