CVE-2026-6659

HIGH

7.5

CVSS v3

Description

Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts. The built-in rand function is predictable, and unsuitable for cryptography.

CWE-338

How to fix

Remediation Available

libcrypt-passwdmd5-perlDebian

Fixed in:1.44-1CVE-2026-6659

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.45%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Other references5

Related Vulnerabilities

Other CWE-338 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2008-0166	High	7.5	71%	-	Fix
CVE-2009-2367	Critical	9.8	23%	-	-
CVE-2024-29868	Critical	9.1	6.0%	-	-
CVE-2024-31497	Medium	5.9	5.8%	-	Fix
CVE-2021-43799	High	8.6	5.4%	-	Fix
CVE-2008-3280	Medium	5.9	4.0%	-	-

Common questions

How do I fix CVE-2026-6659?

Upgrade libcrypt-passwdmd5-perl on debian unstable to 1.44-1 or later.

Is CVE-2026-6659 being actively exploited?

Not that we know of. CVE-2026-6659 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.45% is the estimated probability that it will be exploited in the next 30 days. That is higher than 37% of all scored CVEs.

How severe is CVE-2026-6659?

CVE-2026-6659 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-6659 affect?

Published advisories record a fix for libcrypt-passwdmd5-perl (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-6659

Markdown

[![CVE-2026-6659](https://tridentstack.com/cve/badge/CVE-2026-6659.svg)](https://tridentstack.com/cve/CVE-2026-6659)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-6659"><img src="https://tridentstack.com/cve/badge/CVE-2026-6659.svg" alt="CVE-2026-6659"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-26.