How to Fix CVE-2026-30789: RustDesk Client (Bundle Sibling)
By Sai Kiran Pandrala. Last verified: 2026-05-25.
CVE-2026-30789 is a sibling vulnerability in the same vendor advisory as CVE-2026-30783. Apply the same patched build and you close both. The technical detail below is what differs.
| Severity | 9.3 (Critical) |
|---|---|
| Actively exploited? | No public listing in CISA KEV |
| Affected | RustDesk Client 0 to <=1.4.5 |
| Fixed in | Same patched build as CVE-2026-30783 |
| Type (CWE) | CWE-294 Authentication Bypass by Capture-replay |
What's different about CVE-2026-30789?
Authentication Bypass by Capture-replay, Use of Password Hash With Insufficient Computational Effort vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Client login, peer authentication modules) allows Reusing Session IDs (aka Session Replay). This vulnerability is associated with program files src/client.Rs and program routines hash_password(), login proof construction.
This issue affects RustDesk Client: through 1.4.5.
How to fix CVE-2026-30789
Apply the patched build per the primary write-up: How to Fix CVE-2026-30783. All commands, verification steps, and rollback notes for RustDesk Client are listed there.
Frequently asked questions
Does the CVE-2026-30783 patch close CVE-2026-30789?
Yes. Both CVEs are addressed by the same vendor patch. Applying the patched build closes the full bundle.
Is CVE-2026-30789 listed in CISA KEV?
No public KEV listing at the time of this writing.
Where is the official advisory?
See https://rustdesk.com/docs/en/client/
References
- Official vendor advisory: https://rustdesk.com/docs/en/client/
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-30789
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary: How to Fix CVE-2026-30783
*Written by Sai Kiran Pandrala. Part of the RustDesk Client bundle. Full procedure at how-to-fix-cve-2026-30783.*