CVE-2026-22535
CVE-2026-22535 is a high-severity vulnerability with a CVSS 4.0 base score of 8.9. 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-1366.
Key facts
- Severity: High (CVSS 4.0 base score 8.9)
- EPSS exploit prediction: 0% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-1194
- Weakness: CWE-1366
- Published:
- Last modified:
Description
An attacker with the ability to interact through the network and with access credentials, could, thanks to the unsecured (unencrypted) MQTT communications protocol, write on the server topics of the board that controls the MQTT communications
Frequently asked questions
- What is CVE-2026-22535?
- An attacker with the ability to interact through the network and with access credentials, could, thanks to the unsecured (unencrypted) MQTT communications protocol, write on the server topics of the board that controls the MQTT communications
- How severe is CVE-2026-22535?
- CVE-2026-22535 has a CVSS 4.0 base score of 8.9, rated high severity.
- Is CVE-2026-22535 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-22535?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-22535 have an EU (EUVD) identifier?
- Yes. CVE-2026-22535 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1194.
- When was CVE-2026-22535 published?
- CVE-2026-22535 was published on 2026-01-07 and last updated on 2026-06-17.