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CVE-2026-77151— lin-snow Ech0 crypto.go MD5Encrypt risky encryption

Quick assessment

Affected
lin-snow Ech0
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

L1nSn0w Ech0是L1nSn0w个人开发者的一款功能综合的实用工具。 L1nSn0w Ech0 5.4.1及之前版本存在加密问题漏洞，该漏洞源于internal/util/crypto/crypto.go文件中的MD5Encrypt函数使用存在风险的加密算法，可能被远程利用。

CVSS 3.7 · Low EPSS 0.37% · P29

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 3

VendorProduct Version RangeStatus
lin-snow Ech0 5.4.0 affected
5.4.1 affected
5.4.2 unaffected
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I. Basic Information for CVE-2026-77151

Vulnerability Information
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Vulnerability Title
lin-snow Ech0 crypto.go MD5Encrypt risky encryption
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in lin-snow Ech0 up to 5.4.1. Affected by this issue is the function MD5Encrypt of the file internal/util/crypto/crypto.go. Performing a manipulation results in risky cryptographic algorithm. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitation is known to be difficult. Upgrading to version 5.4.2 can resolve this issue. The patch is named 9ce19a3b0d0765086a655f45d3a706ec1810404f. It is recommended to upgrade the affected component.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用已被攻破或存在风险的密码学算法
Source: CVE Program / CVE List V5
Vulnerability Title
L1nSn0w Ech0 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
L1nSn0w Ech0是L1nSn0w个人开发者的一款功能综合的实用工具。 L1nSn0w Ech0 5.4.1及之前版本存在加密问题漏洞，该漏洞源于internal/util/crypto/crypto.go文件中的MD5Encrypt函数使用存在风险的加密算法，可能被远程利用。
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
lin-snow Ech0 5.4.0 cpe:2.3:a:lin-snow:ech0:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-77151

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III. Intelligence Information for CVE-2026-77151

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Vendor Advisories for CVE-2026-77151 (1)

Proof of Concept for CVE-2026-77151 (2)

Other References for CVE-2026-77151 (3)

IV. Related Vulnerabilities

Same product: Ech0
Same vendor: lin-snow
Same weakness: CWE-327

V. Comments for CVE-2026-77151

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