FRAIL SECURITY IN MQTT PROTOCOL ALLOWS AN ATTACKER MODIFY CRITICAL PARAMETERS
Priority LOW 39CWE-1366Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00148 4th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-22535
- 2026-10-03 Alias added: GHSA-jj3f-4mq7-82wx
References
More EFACEC vulnerabilities
- TI-2026-18112 DENIAL OF SERVICE FOR CONCURRENT CONNECTIONS ON TELNET CVSS 4.0CRITICAL 9.2
- TI-2026-18110 DENIAL OF SERVICE VIA ARP PACKETS CVSS 4.0CRITICAL 9.2
- TI-2026-18114 EXCHANGE OF CREDENTIALS IN CLEAR TEXT CVSS 4.0HIGH 8.7
- TI-2023-27653 Uncontrolled Resource Consumption in EFACEC BCU 500 CVSS 3.1CRITICAL 9.6
- TI-2026-18111 DENIAL OF SERVICE VIA ICMP PACKETS CVSS 4.0HIGH 8.2
- TI-2026-18107 PRIVILEGE ESCALATION VIA SUDO COMMAND CVSS 4.0HIGH 8.6
Sources
- CVE-2026-22535 · CVE Program
- CVE-2026-22535 · NVD
- FIRST EPSS
- GHSA-jj3f-4mq7-82wx · GitHub Advisory Database · CC BY 4.0
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