CVE-2021-21897

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

2.89% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 85.6% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2021-09-08 15:11Z4 YR AGO

Last updated

2024-08-03 18:30Z2 YR AGO

Reserved

2021-01-04

Assigning CNA

talos

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses

• CWE-191Integer Underflow (Wrap or Wraparound)Base
• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

e29f92cf9cdae89ab4bb3fe9dd94c7c29ac9cd53d0df40a0a5dc9a4c218619ec

• talosintelligence.comhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1346x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2022-635599924bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DA4C4X5GMM65VYLUW7Q7YL6P5NDB633A/vendor-advisoryx_refsource_FEDORA
• lists.debian.org[debian-lts-announce] 20220607 [SECURITY] [DLA 3046-1] librecad security updatehttps://lists.debian.org/debian-lts-announce/2022/06/msg00008.htmlmailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2022-8d01b8b6d3https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IMGMEPTYL7WTQ333J6SMC6MUHDMMWT3O/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2022-9d17930140https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5BUOTYU3KKIYE4BEBUFA4MRS462P3OWM/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2022-9cbdf39a5ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L2H36XRMAPQBIOVIIFX6KUT5YOG2ETM6/vendor-advisoryx_refsource_FEDORA