Is CVE-2017-7650 in the CISA KEV catalog?

No. CVE-2017-7650 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-7650?

CVE-2017-7650 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2017-7650?

CVE-2017-7650 has an EPSS score of 2.47% (83th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-7650?

Upgrade mosquitto on debian 11 to 1.4.10-3 or later.

CVE & CISA-KEV Catalog

CVE-2017-7650

MEDIUMEPSS 83th pctl

6.5

CVSS v3

NVD

Description

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

CWE-287Improper Authentication

How to fix

Remediation Available

mosquittoDebian

Fixed in:1.4.10-3CVE-2017-7650

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

2.47%probability of exploitation in 30 days

83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Patch1

mosquitto.org

Exploit1

bugs.eclipse.org

Third-Party Advisory2

Related Vulnerabilities

Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-35082	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-35078	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2017-7921	Critical	9.8	100%	KEV	-
CVE-2024-7593	Critical	9.8	100%	KEV	-
CVE-2023-46805	High	8.2	100%	KEV + Ransom	-
CVE-2022-40684	Critical	9.8	100%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.