How severe is CVE-2025-65503?

CVE-2025-65503 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-65503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-65503?

CVE-2025-65503 affects Redboltz Async Mqtt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-65503?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-65503 have an EU (EUVD) identifier?

Yes. CVE-2025-65503 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198707.

When was CVE-2025-65503 published?

CVE-2025-65503 was published on 2025-11-24 and last updated on 2026-06-17.

CVE-2025-65503

CVE-2025-65503 is a medium-severity vulnerability in Redboltz Async Mqtt with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198707
Weakness: CWE-416
Affected product: Redboltz Async Mqtt
Published: 2025-11-24
Last modified: 2026-06-17

Description

Use after free in endpoint destructors in Redboltz async_mqtt 10.2.5 allows local users to cause a denial of service via triggering SSL initialization failure that results in incorrect destruction order between io_context and endpoint objects.

Frequently asked questions

What is CVE-2025-65503?: Use after free in endpoint destructors in Redboltz async_mqtt 10.2.5 allows local users to cause a denial of service via triggering SSL initialization failure that results in incorrect destruction order between io_context and endpoint objects.
How severe is CVE-2025-65503?: CVE-2025-65503 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-65503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-65503?: CVE-2025-65503 affects Redboltz Async Mqtt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-65503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-65503 have an EU (EUVD) identifier?: Yes. CVE-2025-65503 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198707.
When was CVE-2025-65503 published?: CVE-2025-65503 was published on 2025-11-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redboltz:async_mqtt:10.2.5:*:*:*:*:*:*:*

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