Is CVE-2026-30796 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-30796 being exploited in the wild.

How severe is CVE-2026-30796?

High severity, with a CVSS score of 7.5, published 5 March 2026.

Which products and versions are affected?

RustDesk Client through 1.4.8; RustDesk Server Pro through 1.7.5.

Is there a fix for CVE-2026-30796?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-30796 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-30796?

Check whether you run Apple macOS, Linux Kernel, Microsoft Windows or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-30796: RustDesk Client plaintext credential disclosure in heartbeat sync

CVE-2026-30796 · Severity: high · CVSS 7.5 · Published 2026-03-05

RustDesk, a remote desktop application, contains a security flaw where it transmits address book passwords in an insecure format. If an attacker manages to intercept the connection or trick the software into connecting to a malicious server, they can capture these passwords. This allows the attacker to gain unauthorized access to the user's saved address book and the contact information within it.

Technologies: Apple macOS, Linux Kernel, Microsoft Windows, RustDesk Client, RustDesk Server Pro. Vendors: Apple, Linux, Microsoft, Rustdesk.

Quick answers

Is CVE-2026-30796 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-30796 being exploited in the wild.
How severe is CVE-2026-30796?: High severity, with a CVSS score of 7.5, published 5 March 2026.
Which products and versions are affected?: RustDesk Client through 1.4.8; RustDesk Server Pro through 1.7.5.
Is there a fix for CVE-2026-30796?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-30796 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-30796?: Check whether you run Apple macOS, Linux Kernel, Microsoft Windows or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The RustDesk Client (specifically in src/hbbs_http/sync.rs) transmits the preset address-book password verbatim within the JSON body of heartbeat synchronization requests. While typically protected by HTTPS, the application is vulnerable to a TLS downgrade attack (CVE-2026-30794) or infrastructure hijacking (CVE-2026-30797) that allows a rogue API endpoint to recover the credential. Because the password is a reusable shared secret rather than a zero-knowledge proof (like SRP), an attacker who captures the plaintext can use it to authorize access to the server-side address book. This affects all native clients (Windows, MacOS, Linux, iOS, Android) through version 1.4.8.

Affected products

RustDesk RustDesk Client through 1.4.8
RustDesk RustDesk Server Pro through 1.7.5

Timeline

2026-03-05: disclosed: Initial vulnerability discovery and publication.
2026-06-22: advisory: Advisory updated with expanded version ranges and CWE-522.

References

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