CVE-2021-40403

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.08% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 62.9% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2022-02-04 00:00Z4 YR AGO

Last updated

2025-04-15 19:11Z1 YR AGO

Reserved

2021-09-01

Assigning CNA

talos

Record state

PUBLISHED

Severity

Medium (CVSS 5.8)

CNA CVSS vector

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

Weaknesses

• CWE-456Missing Initialization of a VariableVariant
• CWE-909Missing Initialization of ResourceClass

Data version

5.1

Document digest

077b4c9cbfe09181221b87560230a110a237efe7ef9ccebace2190c7e6870535

• talosintelligence.comhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1417
• lists.fedoraproject.orgFEDORA-2022-e819bd191fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PTGBC37N2FV7NKOWFVCFMPAFYEPHSB7C/vendor-advisory
• www.debian.orgDSA-5306https://www.debian.org/security/2022/dsa-5306vendor-advisory