CVE-2020-15326
Description
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded certificate for Ejabberd in ejabberd.pem.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 contain a hardcoded TLS certificate for the Ejabberd XMPP server, enabling man-in-the-middle attacks.
Vulnerability
Zyxel CloudCNM SecuManager versions 3.1.0 and 3.1.1 ship with a hardcoded TLS certificate for the Ejabberd XMPP service, stored in ejabberd.pem [1]. This certificate is identical across all installations, meaning the private key is publicly known.
Exploitation
An attacker with network access to the XMPP traffic can use the known private key to decrypt communications or impersonate the Ejabberd server. No authentication or user interaction is required beyond intercepting the traffic.
Impact
Successful exploitation allows the attacker to read, modify, or inject XMPP messages, compromising the confidentiality and integrity of communications managed by the SecuManager. This can lead to further compromise of managed devices.
Mitigation
At the time of disclosure, no official patch or workaround was provided by Zyxel [1]. Users should monitor for firmware updates and consider network segmentation to limit exposure of the XMPP service.
AI Insight generated on May 27, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Zyxel/CloudCNM SecuManagerdescription
- Range: 3.1.0, 3.1.1
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- pierrekim.github.io/blog/2020-03-09-zyxel-secumanager-0day-vulnerabilities.htmlmitrex_refsource_MISC
- www.zyxel.com/support/vulnerabilities-of-CloudCNM-SecuManager.shtmlmitrex_refsource_MISC
News mentions
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