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CVE-2026-73108— RustDesk < 1.4.7 Uncontrolled Memory Allocation DoS via BytesCodec

Quick assessment

Affected
rustdesk rustdesk
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RustDesk是RustDesk团队开源的一款远程桌面连接软件。 RustDesk 1.4.7之前版本存在资源管理错误漏洞，该漏洞源于BytesCodec在处理帧头时未对内存分配进行有效控制，可能导致未经身份验证的攻击者通过并发TCP连接造成内存耗尽和拒绝服务。

CVSS 7.5 · High EPSS 0.77% · P55

Possible ATT&CK Techniques 1 AI

T1480 · Execution Guardrails

Affected Version Matrix 1

VendorProduct Version RangeStatus
rustdesk rustdesk < 1.4.7 affected
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I. Basic Information for CVE-2026-73108

Vulnerability Information
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Vulnerability Title
RustDesk < 1.4.7 Uncontrolled Memory Allocation DoS via BytesCodec
Source: CVE Program / CVE List V5
Vulnerability Description
RustDesk versions before 1.4.7 contain an uncontrolled speculative memory allocation vulnerability in BytesCodec. Before authentication, the decoder trusts the payload length encoded in a four-byte frame header and reserves that amount before receiving the payload. A crafted header can request up to 1,073,741,823 bytes of capacity, allowing unauthenticated attackers to use concurrent TCP connections to cause memory exhaustion and denial of service. The fix caps header-triggered speculative preallocation at 256 KiB.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
RustDesk 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RustDesk是RustDesk团队开源的一款远程桌面连接软件。 RustDesk 1.4.7之前版本存在资源管理错误漏洞，该漏洞源于BytesCodec在处理帧头时未对内存分配进行有效控制，可能导致未经身份验证的攻击者通过并发TCP连接造成内存耗尽和拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rustdesk rustdesk 0 ~ 1.4.7 -

II. Public POCs for CVE-2026-73108

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8033 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-73108

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Patches & Fixes for CVE-2026-73108 (2)

Vendor Advisories for CVE-2026-73108 (1)

Vendor Pages for CVE-2026-73108 (1)

IV. Related Vulnerabilities

Same product: rustdesk
Same vendor: rustdesk
Same weakness: CWE-770

V. Comments for CVE-2026-73108

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