CVE-2021-3855

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total 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

1.81% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 78.3% 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:L/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

2023-02-24 13:02Z3 YR AGO

Last updated

2026-05-18 11:56Z5 MO AGO

Reserved

2021-10-04

Assigning CNA

TR-CERT

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class

Data version

5.2

Document digest

a6d6e4fdcdb91f2b32eb4faba6cec0541f49fc8ae32efef9d7e52fe91b894ef8

• docs.liman.devhttps://docs.liman.dev/baslangic/guvenlikrelease-notes
• www.usom.gov.trhttps://www.usom.gov.tr/bildirim/tr-23-0109government-resourcebroken-link
• siberguvenlik.gov.trhttps://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-23-0109government-resource