CVE-2021-37750

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

2.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 84.4% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-08-23 00:00Z5 YR AGO

Last updated

2026-10-14 11:49Z15 DAYS AGO

Reserved

2021-07-30

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

bcd4674a132375f45bc89ecfe82d522438d7ce16aecb249df0cb16b365923295

• web.mit.eduhttps://web.mit.edu/kerberos/advisories/
• github.comhttps://github.com/krb5/krb5/releases
• lists.fedoraproject.orgFEDORA-2021-f2c8514f02https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/vendor-advisory
• lists.debian.org[debian-lts-announce] 20210930 [SECURITY] [DLA 2771-1] krb5 security updatehttps://lists.debian.org/debian-lts-announce/2021/09/msg00019.htmlmailing-list
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujul2022.html
• github.comhttps://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210923-0002/
• www.starwindsoftware.comhttps://www.starwindsoftware.com/security/sw-20220817-0004/
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html