CVE-2026-35556 Plaintext storage of a password in OpenPLC_V3

Critical 9.2 Published 9 Apr 2026 Updated 10 Apr 2026

Attackers can retrieve plaintext credentials from OpenPLC_V3 to access sensitive information and potentially take over accounts.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-35556?

CVE-2026-35556 is a critical vulnerability in OpenPLC_V3, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

OpenPLC_V3 is vulnerable to a Plaintext Storage of a Password vulnerability that could allow an attacker to retrieve credentials and access sensitive information.

Weakness: CWE-256

Which versions are affected by CVE-2026-35556?

It affects 1 product.

Products include Openplcproject Openplc V3 Firmware.

How do I fix CVE-2026-35556?

No fix has been published for CVE-2026-35556 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-35556 being exploited?

There is no known exploitation of CVE-2026-35556 in the wild and no public exploit code.

Sources

Also known as GHSA-xgm5-hf6v-855x.