CVE-2021-4327

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

0.93% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 58.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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

2023-03-01 10:05Z3 YR AGO

Last updated

2024-08-03 17:23Z2 YR AGO

Reserved

2023-03-01

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

• CWE-190Integer Overflow or WraparoundBase

Data version

5.1

Document digest

473b1b34b945812c7024e89f1d5848685592f9eba193fa4c671dc47476a42ad4

• vuldb.comhttps://vuldb.com/?id.222074vdb-entrytechnical-description
• vuldb.comhttps://vuldb.com/?ctiid.222074signaturepermissions-required
• devcraft.iohttps://devcraft.io/2021/02/11/serenityos-writing-a-full-chain-exploit.htmlexploit
• github.comhttps://github.com/SerenityOS/serenity/commit/f6c6047e49f1517778f5565681fb64750b14bf60patch