CVE-2026-78556 Security feature bypass in Industrial Edge App Publisher
An attacker can perform Man-in-the-Middle attacks by exploiting improper TLS certificate validation in Siemens Industrial Edge App Publisher.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-78556?
CVE-2026-78556 is a high-severity vulnerability in Siemens Industrial Edge App Publisher, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability has been identified in Industrial Edge App Publisher (All versions < V1.27.9). The affected software does not properly validate the server certificate when initiating a TLS connection. This allows an attacker to intercept and relay communication (Man-in-the-Middle attack) and to spoof a trusted entity by interfering in the communication path between the client and the intended server.
Weakness: CWE-295
Which versions are affected by CVE-2026-78556?
How do I fix CVE-2026-78556?
No fix has been published for CVE-2026-78556 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-78556 being exploited?
There is no known exploitation of CVE-2026-78556 in the wild and no public exploit code.
Sources
Also known as GHSA-rc9q-86jg-3j8q.