CVE-2026-30796Public exploitNetwork attack vector

Address-book disclosure via plaintext heartbeat credential

Published Mar 5, 2026 · Updated Mar 5, 2026

Cleartext credential handling in RustDesk Server Pro 1.7.5 and earlier allows remote attackers to obtain address-book passwords via API sync traffic. The closed-source heartbeat API handler accepts preset-address-book-password as a reusable plaintext value rather than a non-replayable proof. Exposure requires a party to observe or terminate the API connection; possession of the value authorizes access to the server-side address book.

CVSS severity8.7
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext credential handling in RustDesk Server Pro 1.7.5 and earlier allows remote attackers to obtain address-book passwords via API sync traffic. The closed-source heartbeat API handler accepts preset-address-book-password as a reusable plaintext value rather than a non-replayable proof. Exposure requires a party to observe or terminate the API connection; possession of the value authorizes access to the server-side address book.

The record

CVE
CVE-2026-30796
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
RustDesk
Product
RustDesk Server Pro
Classifications
CWE-319, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=0 <=1.7.5 changes=[{"at":"Server Pro","status":"affected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

RustDesk · RustDesk Server Proversion=0 <=1.7.5 changes=[{"at":"Server Pro","status":"affected"}]

Published CVSS scores

8.7VULSec LabsCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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