Is CVE-2026-9641 in the CISA KEV catalog?

No. CVE-2026-9641 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-9641?

CVE-2026-9641 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2026-9641?

CVE-2026-9641 has an EPSS score of 0.23% (13th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-9641?

Upgrade libcrypt-pbkdf2-perl on debian unstable to 0.261630-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-9641

MEDIUM

5.3

CVSS v3

NVD

Description

Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations. The default algorithm is HMAC-SHA1, which should only be used for legacy systems. These versions default to using 1000 iterations. Depending on the chosen algorithm, 220,000 to 1,400,000 iterations should be used.

CWE-916

How to fix

Remediation Available

libcrypt-pbkdf2-perlDebian

Fixed in:0.261630-1CVE-2026-9641

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

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.23%probability of exploitation in 30 days

13thpercentile

Low risk: more likely to be exploited than 13% of all known CVEs.

References

Other references7

Embed a live status badge for CVE-2026-9641

Markdown

[![CVE-2026-9641](https://tridentstack.com/cve/badge/CVE-2026-9641.svg)](https://tridentstack.com/cve/CVE-2026-9641)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-9641"><img src="https://tridentstack.com/cve/badge/CVE-2026-9641.svg" alt="CVE-2026-9641"></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.

Start free

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 2026-06-14.