How severe is CVE-2026-30783?

CVE-2026-30783 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-30783 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-30783?

CVE-2026-30783 affects Rustdesk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-30783?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-30783 have an EU (EUVD) identifier?

Yes. CVE-2026-30783 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9831.

When was CVE-2026-30783 published?

CVE-2026-30783 was published on 2026-03-05 and last updated on 2026-06-22.

CVE-2026-30783

CVE-2026-30783 is a critical-severity vulnerability in Rustdesk with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-602.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 4.8
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9831
Weakness: CWE-602
Affected product: Rustdesk
Published: 2026-03-05
Last modified: 2026-06-22

Description

A vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android, WebClient (Client signaling, API sync loop, config management modules) allows Privilege Abuse. This vulnerability is associated with program files src/rendezvous_mediator.Rs, src/hbbs_http/sync.Rs and program routines API sync loop, api-server config handling. This issue affects RustDesk Client: through 1.4.8.

Frequently asked questions

What is CVE-2026-30783?: A vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android, WebClient (Client signaling, API sync loop, config management modules) allows Privilege Abuse. This vulnerability is associated with program files src/rendezvous_mediator.Rs, src/hbbs_http/sync.Rs and program routines API sync loop, api-server config handling. This issue affects RustDesk Client: through 1.4.8.
How severe is CVE-2026-30783?: CVE-2026-30783 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-30783 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-30783?: CVE-2026-30783 affects Rustdesk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-30783?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-30783 have an EU (EUVD) identifier?: Yes. CVE-2026-30783 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9831.
When was CVE-2026-30783 published?: CVE-2026-30783 was published on 2026-03-05 and last updated on 2026-06-22.

References

Affected products (1)

cpe:2.3:a:rustdesk:rustdesk:*:*:*:*:webclient:*:*:*

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