CVE-2021-3889

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

1.29% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 69.8% of scored records. A rank, not a probability.

NVD base score

8.1 (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:N/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

2021-10-19 12:30Z5 YR AGO

Last updated

2024-08-03 17:09Z2 YR AGO

Reserved

2021-10-15

Assigning CNA

@huntrdev

Record state

PUBLISHED

Severity

High (CVSS 7.1)

CNA CVSS vector

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

Weaknesses

• CWE-823Use of Out-of-range Pointer OffsetBase
• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.1

Document digest

1b50d890c58adfebf8ba121d3de8d4d4b037ace6459459e90288cdb4b377758f

• github.comhttps://github.com/bfabiszewski/libmobi/commit/bec783e6212439a335ba6e8df7ab8ed610ca9a21x_refsource_MISC
• huntr.devhttps://huntr.dev/bounties/efb3e261-3f7d-4a45-8114-e0ace6b21516x_refsource_CONFIRM