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CVE-2023-33657

22
FAUCET Score

CVE-2023-33657 is a high-severity use-after-free vulnerability in NanoMQ 0.17.2, specifically within the nni_mqtt_msg_get_publish_property() function, affecting EMQ X NanoMQ products. This vulnerability, stemming from improper data tracing, can be exploited remotely without authentication to cause a denial-of-service (DoS) attack. While the CVSS score is 7.5, there is currently no public exploit code, active exploitation, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.17.2CPE matchmatch criteria
cpe:2.3:a:emqx:nanomq:0.17.2:*:*:*:*:*:*:*

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
0.96%
Probability of exploitation in next 30 days
EPSS Percentile
57.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0096 is in the 32nd percentile among its peer group of 51,551 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

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / emqx/nanomq
Product
github.com / emqx/nanomq/issues/1165
ExploitIssue Tracking
github.com / emqx/nanomq/pull/1187
Patch