Is CVE-2026-13491 in the CISA KEV catalog?

No. CVE-2026-13491 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-13491?

CVE-2026-13491 has a CVSS v3 base score of 3.7 (LOW).

What is the EPSS score for CVE-2026-13491?

CVE-2026-13491 has an EPSS score of 0.41% (33th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-13491?

No published fix for CVE-2026-13491 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-13491

LOW

3.7

CVSS v3

NVD

Description

A vulnerability was detected in 78 xiaozhi-esp32 up to 2.2.6. This vulnerability affects the function Application::GetInstance of the file main/protocols/mqtt_protocol.cc of the component MQTT Goodbye Handler. Performing a manipulation of the argument session_id results in denial of service. The attack is possible to be carried out remotely. The complexity of an attack is rather high. It is stated that the exploitability is difficult. The exploit is now public and may be used. The patch is named e182471f8c5a22434346bd98da34d3b66c8c8b3e. It is recommended to apply a patch to fix this issue.

CWE-404

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.41%probability of exploitation in 30 days

33rdpercentile

Low risk: more likely to be exploited than 33% of all known CVEs.

References

Other references8

Embed a live status badge for CVE-2026-13491

Markdown

[![CVE-2026-13491](https://tridentstack.com/cve/badge/CVE-2026-13491.svg)](https://tridentstack.com/cve/CVE-2026-13491)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-13491"><img src="https://tridentstack.com/cve/badge/CVE-2026-13491.svg" alt="CVE-2026-13491"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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 2026-06-29.