Vulnerability · Published Aug 20, 2026 · Assigned by VulDB

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

Low 3.7

In plain English

A low-severity broken cryptography in Ech0 from lin-snow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.4%top 69.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
lin-snow	Ech0	5.4.05.4.1

Weakness: CWE-327, CWE-310 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C

References

VDB-393736 | lin-snow Ech0 crypto.go MD5Encrypt risky encryption vdb-entry, technical-description
VDB-393736 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-77151 | CVE Analysis and Report third-party-advisory
Submit #881015 | lin-snow Ech0 5.4.1 Unsalted MD5 Password Hashing in Ech0 Enables Mass Credential Cr third-party-advisory
https://github.com/lin-snow/Ech0/issues/314 issue-tracking
https://github.com/lin-snow/Ech0/pull/315 issue-tracking, patch
https://github.com/lin-snow/Ech0/commit/9ce19a3b0d0765086a655f45d3a706ec1810404f patch
https://github.com/lin-snow/Ech0/releases/tag/ech0-5.4.2 patch
https://github.com/lin-snow/Ech0/ product