CVE-2026-77151: Risky Cryptographic Algorithm in lin-snow Ech0
Description
CVE-2026-77151 is a medium severity vulnerability in lin-snow Ech0 versions 5.4.0 and 5.4.1 involving the use of a risky cryptographic algorithm in the MD5Encrypt function. The issue allows remote exploitation but requires high attack complexity and no privileges or user interaction. Upgrading to version 5.4.2 resolves the vulnerability.
CVSS v4.0
Score 6.3medium
Affected software
lin-snow
Ech0
pkg:golang/github.com/lin-snow/ech0cpe:2.3:a:lin-snow:ech0:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the MD5Encrypt function in the internal/util/crypto/crypto.go file of lin-snow Ech0 up to version 5.4.1. The use of the MD5 cryptographic algorithm is considered risky, potentially weakening security. Remote exploitation is possible but difficult due to high attack complexity. The issue is fixed in version 5.4.2 by patch 9ce19a3b0d0765086a655f45d3a706ec1810404f.
Potential Impact
The vulnerability weakens cryptographic security by using the MD5 algorithm, which is considered insecure. Remote attackers could exploit this flaw, but the attack complexity is high and no privileges or user interaction are required. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade lin-snow Ech0 to version 5.4.2, which contains the official fix for this vulnerability. No additional mitigation steps are required once the upgrade is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-20T13:57:41.826Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a875b0cacd9273b49100d08
Added to database: 08/20/2026, 19:52:44 UTC
Last enriched: 09/11/2026, 04:18:18 UTC
Last updated: 10/05/2026, 06:48:18 UTC
Views: 73
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