CVE-2021-3560

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2023-05-12. Federal remediation due 2023-06-02.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active 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

23.70% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 97.6% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

Important. Red Hat's rating for its own products, not a CVSS rating.

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

2022-02-16 00:00Z4 YR AGO

Last updated

2025-10-21 23:15Z1 YR AGO

Reserved

2021-05-20

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

• CWE-863Incorrect AuthorizationClass
• CWE-754Improper Check for Unusual or Exceptional ConditionsClass

Data version

5.1

Document digest

927a4d1c436292f4ffbd2ff1ace8b85b20ee3e097271d02357d998b4ec4631b8

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1961710
• github.bloghttps://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/
• packetstormsecurity.comhttp://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.html
• packetstormsecurity.comhttp://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.html
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3560government-resource