CVE-2021-3121

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

3.48% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 88.1% of scored records. A rank, not a probability.

NVD base score

8.6 (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:L/I:L/A:H

NVD analysis status

Modified. 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

2021-01-11 05:57Z5 YR AGO

Last updated

2024-08-03 16:45Z2 YR AGO

Reserved

2021-01-11

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-129Improper Validation of Array IndexVariant

Data version

5.1

Document digest

019e629c29e630425af5fd4e10b9ffa0288629b0ce604afb343f78ac607da40f

• github.comhttps://github.com/gogo/protobuf/commit/b03c65ea87cdc3521ede29f62fe3ce239267c1bcx_refsource_MISC
• github.comhttps://github.com/gogo/protobuf/compare/v1.3.1...v1.3.2x_refsource_MISC
• lists.apache.org[pulsar-commits] 20210121 [GitHub] [pulsar-client-go] hrsakai opened a new pull request #446: Upgrade gogo/protobuf to 1.3.2https://lists.apache.org/thread.html/r88d69555cb74a129a7bf84838073b61259b4a3830190e05a3b87994e%40%3Ccommits.pulsar.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[pulsar-commits] 20210122 [GitHub] [pulsar-client-go] hrsakai opened a new pull request #446: Upgrade gogo/protobuf to 1.3.2https://lists.apache.org/thread.html/rc1e9ff22c5641d73701ba56362fb867d40ed287cca000b131dcf4a44%40%3Ccommits.pulsar.apache.org%3Emailing-listx_refsource_MLIST
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210219-0006/x_refsource_CONFIRM
• discuss.hashicorp.comhttps://discuss.hashicorp.com/t/hcsec-2021-23-consul-exposed-to-denial-of-service-in-gogo-protobuf-dependency/29025x_refsource_MISC
• lists.apache.org[skywalking-notifications] 20211018 [GitHub] [skywalking-swck] hanahmily opened a new pull request #37: Fix vulnerabilitieshttps://lists.apache.org/thread.html/r68032132c0399c29d6cdc7bd44918535da54060a10a12b1591328bff%40%3Cnotifications.skywalking.apache.org%3Emailing-listx_refsource_MLIST