Credential disclosure via invalid certificate acceptance
Published Mar 5, 2026 · Updated Mar 5, 2026
Cleartext transmission in RustDesk Client 1.4.5 and earlier allows attackers to read address-book passwords via HTTPS interception. In src/hbbs_http/sync.rs, the HTTP client accepts an invalid certificate after a TLS handshake failure and sends preset-address-book-password in the heartbeat JSON body. Exploitation requires man-in-the-middle attackers to intercept a heartbeat from a client configured with a preset address-book password, exposing that reusable secret without altering data or interrupting service.
Summary
What happened
Cleartext transmission in RustDesk Client 1.4.5 and earlier allows attackers to read address-book passwords via HTTPS interception. In src/hbbs_http/sync.rs, the HTTP client accepts an invalid certificate after a TLS handshake failure and sends preset-address-book-password in the heartbeat JSON body. Exploitation requires man-in-the-middle attackers to intercept a heartbeat from a client configured with a preset address-book password, exposing that reusable secret without altering data or interrupting service.
The record
- CVE
- CVE-2026-30795
- Published
- Mar 5, 2026
- Updated
- Mar 5, 2026
- Vendor
- RustDesk
- Product
- RustDesk
- Classifications
- CWE-319, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 5, 2026CVE publishedPublication date reported by the CVE source.
- Mar 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=1.4.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- VULSec Labs RustDesk TLS proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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