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CVE-2023-33658

22
FAUCET Score

CVE-2023-33658 is a heap buffer overflow vulnerability in NanoMQ 0.17.2, affecting EMQ X NanoMQ, that can be triggered by calling the nni_msg_get_pub_pid() function in message.c. This vulnerability carries a high severity CVSS score of 7.5, indicating it can be exploited remotely with low complexity to cause a denial of service. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), 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
1.20%
Probability of exploitation in next 30 days
EPSS Percentile
64.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0120 is in the 44th percentile among its peer group of 51,553 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/1153
Exploit
github.com / nanomq/NanoNNG/commit/657e6c81c474bdee0e6413483b990e90610030c1
Patch