CVE-2026-30796High· 7.5▾ TwilightCleartext Transmission of Sensitive Information, Insufficiently Protected Credentials vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Address book sync, Heartbeat sync loop modules…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
0.3% → 0.5%
Cleartext Transmission of Sensitive Information, Insufficiently Protected Credentials vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Address book sync, Heartbeat sync loop modules) allows Sniffing Attacks.
The client places the preset address-book password verbatim into the heartbeat sync JSON body (src/hbbs_http/sync.rs). Over an intact HTTPS session it is not exposed in transit, but it is a reusable shared secret rather than a zero-knowledge proof, so it is recovered by any party that becomes the API endpoint - under the automatic invalid-certificate TLS downgrade (CVE-2026-30794) or a re-homed/rogue API server (CVE-2026-30797) - and the leaked credential then authorizes the server-side address book.
This vulnerability is associated with program files src/hbbs_http/sync.rs and program routines heartbeat sync body builder (emits preset-address-book-password).
This issue affects RustDesk Client: through 1.4.8.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2020-5404Medium· 5.9The HttpClient from Reactor Netty, versions 0.9.x prior to 0.9.5, and versions 0.8.x prior to 0.8.16, may be used incorrectly, leading to a credentials leak during a redirect to a different domain
CVE-2019-11284High· 8.6Pivotal Reactor Netty, versions prior to 0.8.11, passes headers through redirects, including authorization ones
CVE-2021-30116Critical· 10.0Kaseya VSA before 9.5.7 allows credential disclosure, as exploited in the wild in July 2021
CVE-2024-29992Medium· 5.5Azure Identity Library for .NET Information Disclosure Vulnerability
CVE-2026-94611High· 8.1authentik is an open-source identity provider
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