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CVE-2021-22116

25
FAUCET Score

CVE-2021-22116 is a denial-of-service vulnerability affecting all RabbitMQ versions prior to 3.8.16, specifically when the AMQP 1.0 plugin is enabled. This high-severity vulnerability (CVSS 7.5) can be exploited remotely by an unauthenticated attacker sending specially crafted AMQP messages, leading to a complete denial of service. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.8.16CPE matchmatch criteria
cpe:2.3:a:vmware:rabbitmq:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.39%
Probability of exploitation in next 30 days
EPSS Percentile
69.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0139 is in the 50th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 16 (Train)Fixed in: rabbitmq-server

Vendor Advisories (1)

redhatCVE-2021-22116Moderate

rabbitmq-server: improper input validation may lead to DoS

May 13, 2021

References

lists.debian.org / debian-lts-announce/2021/07/msg00011.html
Mailing ListThird Party Advisory
tanzu.vmware.com / security/cve-2021-22116
Vendor Advisory