CVE-2025-15638: Net::Dropbear versions before 0.14 for Perl contains a vulnerable version of libtomcrypt. Net::Dropbear versi

Q: How do I fix CVE-2025-15638?

net\: upgrade to 0.14. Exact commands for each OS are on this page.

Q: Is CVE-2025-15638 being exploited?

CVE-2025-15638 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-15638 affect?

CVE-2025-15638 affects net\. Severity is critical (CVSS 10.0). Net::Dropbear versions before 0.14 for Perl contains a vulnerable version of libtomcrypt. Net::Dropbear versions before 0.14 includes versions of Dropbear 2019.78 or earlier. These include versions of libtomcrypt v1.18.1 or earlier, which

Q: How urgent is CVE-2025-15638?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 10.0REMOTEUPGRADE

CVE-2025-15638 is a critical-severity flaw (CVSS 10.0) affecting net\. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Net::Dropbear versions before 0.14 for Perl contains a vulnerable version of libtomcrypt. Net::Dropbear versions before 0.14 includes versions of Dropbear 2019.78 or earlier. These include versions of libtomcrypt v1.18.1 or earlier, which is affected by CVE-2016-6129 and CVE-2018-12437.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Published	2026-04-21
Last modified	2026-10-07

Publisher (CNA): CPANSec · Vendor: atrodo

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 16:16 UTCPublished CVE record published
2026-10-07 09:10 UTCUpdated Record last modified

atrodo net\ UPGRADE

Affected: < 0.14

Fixed in: 0.14

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.14 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade net

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade net

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2025-15638?

net\: upgrade to 0.14. Exact commands for each OS are on this page.

Is CVE-2025-15638 being exploited?

CVE-2025-15638 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-2025-15638 affect?

CVE-2025-15638 affects net\. Severity is critical (CVSS 10.0). Net::Dropbear versions before 0.14 for Perl contains a vulnerable version of libtomcrypt. Net::Dropbear versions before 0.14 includes versions of Dropbear 2019.78 or earlier. These include versions of libtomcrypt v1.18.1 or earlier, which

How urgent is CVE-2025-15638?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

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References

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