CVE-2026-111324: rustdesk-api through 2.7 Authorization Bypass via POST /api/sysinfo

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-15 · updated 2026-10-21
Weakness: CWE-639

Description

rustdesk-api through 2.7 contains an authorization bypass vulnerability that allows unauthenticated attackers to overwrite existing peer records by supplying only a target device ID to POST /api/sysinfo. Attackers can overwrite hostname, username, OS and uuid without uuid verification, then log in presenting that uuid to rebind the peer to their account.

Affected products

lejianwen rustdesk-api: through 2.7

References

https://github.com/lejianwen/rustdesk-api
https://github.com/lejianwen/rustdesk-api/blob/v2.7/http/controller/api/peer.go#L26-L57
https://github.com/lejianwen/rustdesk-api/blob/v2.7/http/router/api.go#L60-L76
https://hackmd.io/@hieuPenguinnn/rustdesk-api-sysinfo-unauth-peer-tamper
https://www.vulncheck.com/advisories/rustdesk-api-through-2.7-authorization-bypass-via-post-api-sysinfo
https://hackmd.io/@hieuPenguinnn/rustdesk-api-sysinfo-unauth-peer-tamper

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