CVE-2024-58040: Crypt::RandomEncryption for Perl version 0.01 uses insecure rand() function during encryption.

This month

CRITICAL 9.1REMOTEMITIGATE

CVE-2024-58040 is a critical-severity flaw (CVSS 9.1) affecting crypt\. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Crypt::RandomEncryption for Perl version 0.01 uses insecure rand() function during encryption.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-331, CWE-338
Published	2025-09-30
Last modified	2026-06-17

Publisher (CNA): CPANSec · Vendor: qwer

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-30 11:37 UTCPublished CVE record published
2026-06-17 08:14 UTCUpdated Record last modified

qwer crypt\ MITIGATE

Affected: \ randomencryption

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy crypt || rpm -q crypt || crypt --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-58040?

crypt\: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-58040 being exploited?

CVE-2024-58040 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-58040 affect?

CVE-2024-58040 affects crypt\. Severity is critical (CVSS 9.1). Crypt::RandomEncryption for Perl version 0.01 uses insecure rand() function during encryption.

How urgent is CVE-2024-58040?

Priority 41/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Perl vulnerabilities

Related CVEs

CVE-2026-5086 HIGH 7.5 UPGRADE Crypt::SecretBuffer versions before 0.019 for Perl is suseceptible to timing attacks. For example, if Crypt::
CVE-2026-8463 MEDIUM 5.3 UPGRADE Crypt::Argon2 versions from 0.017 before 0.031 for Perl perform a heap out-of-bounds read in argon2_verify on
CVE-2026-58102 CRITICAL 9.1 UPGRADE Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow a heap out-of-bounds read via a long certificate ext
CVE-2026-58101 HIGH 7.5 UPGRADE Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference. X50
CVE-2025-15444 CRITICAL 9.8 UPGRADE Crypt::Sodium::XS module versions prior to 0.000042, for Perl, include a vulnerable version of libsodium libs

References

← Back to latest CVEs