CVE-2020-4427

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2021-11-03. Federal remediation due 2022-05-03.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• 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

70.03% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 99.3% 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

Analyzed. 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

2020-05-07 19:20Z6 YR AGO

Last updated

2025-11-03 21:44Z10 MO AGO

Reserved

2019-12-30

Assigning CNA

ibm

Record state

PUBLISHED

Severity

Critical (CVSS 9.0)

CNA CVSS vector

CVSS:3.0/I:H/UI:N/PR:N/C:H/A:H/AV:N/S:C/AC:H/RL:O/RC:C/E:U

Weaknesses

• CWE-287Improper AuthenticationClass

Data version

5.2

Document digest

72faaba1aca4e50a6468d0978ba79bbf996d97401ab0a22dd7a26705887da1d7

• www.ibm.comhttps://www.ibm.com/support/pages/node/6206875x_refsource_CONFIRM
• exchange.xforce.ibmcloud.comibm-drm-cve20204427-sec-bypass (180532)https://exchange.xforce.ibmcloud.com/vulnerabilities/180532vdb-entryx_refsource_XF
• seclists.orghttp://seclists.org/fulldisclosure/2024/Nov/1
• seclists.orghttp://seclists.org/fulldisclosure/2024/Nov/0
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-4427government-resource