CVE-2026-100388

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.17% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 7.2% of scored records. A rank, not a probability.

NVD base score

5.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-09-30.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-25 20:13Z1 MO AGO

Last updated

2026-09-30 00:08Z29 DAYS AGO

Reserved

2026-09-25

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-862Missing AuthorizationClass

Data version

5.2

Document digest

b547e4a4a3cc91696882b169c18f4248d5b977fe02e94b936f0d660cfe37ef54

• github.comPull Request #16333https://github.com/rustdesk/rustdesk/pull/16333issue-trackingpatch
• github.comPatch Commithttps://github.com/rustdesk/rustdesk/commit/f299fb9906006247863250d7dfaa016f29eef7a4patch
• github.comhttps://github.com/rustdesk/rustdesk/blob/1.4.9/src/server/connection.rs#L3074-L3092technical-description
• github.comhttps://github.com/rustdesk/rustdeskproduct
• www.vulncheck.comVulnCheck Advisory: RustDesk before 1.5.0 Missing Authorization Check on Incoming File Clipboard Messageshttps://www.vulncheck.com/advisories/rustdesk-before-1.5.0-missing-authorization-check-on-incoming-file-clipboard-messagesthird-party-advisory