CVE-2021-22569

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

1.66% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 76.5% of scored records. A rank, not a probability.

NVD base score

5.5 (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:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. 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

2022-01-07 00:00Z4 YR AGO

Last updated

2025-04-21 13:57Z1 YR AGO

Reserved

2021-01-05

Assigning CNA

Google

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-696Incorrect Behavior OrderClass

Data version

5.1

Document digest

fdf5d2c8df98a9e3f827d375f35f029ed9144bd703754f676a56234db78cb1ea

• bugs.chromium.orghttps://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39330
• cloud.google.comhttps://cloud.google.com/support/bulletins#gcp-2022-001
• www.openwall.com[oss-security] 20220112 CVE-2021-22569: Protobuf Java, Kotlin, JRuby DoShttp://www.openwall.com/lists/oss-security/2022/01/12/4mailing-list
• www.openwall.com[oss-security] 20220112 Re: CVE-2021-22569: Protobuf Java, Kotlin, JRuby DoShttp://www.openwall.com/lists/oss-security/2022/01/12/7mailing-list
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.html
• lists.debian.org[debian-lts-announce] 20230418 [SECURITY] [DLA 3393-1] protobuf security updatehttps://lists.debian.org/debian-lts-announce/2023/04/msg00019.htmlmailing-list