CVE-2021-41096: Rucky is a USB HID Rubber Ducky Launch Pad for Android

Q: How do I fix CVE-2021-41096?

rucky: upgrade to newer than 2.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-41096 being exploited?

CVE-2021-41096 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-2021-41096 affect?

CVE-2021-41096 affects rucky. Severity is high (CVSS 7.5). Rucky is a USB HID Rubber Ducky Launch Pad for Android. Versions 2.2 and earlier for release builds and versions 425 and earlier for nightly builds suffer from use of a weak cryptographic algorithm (RSA/ECB/PKCS1Padding). The issue will be

Q: How urgent is CVE-2021-41096?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2021-41096 is a high-severity flaw (CVSS 7.5) affecting rucky. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Rucky is a USB HID Rubber Ducky Launch Pad for Android. Versions 2.2 and earlier for release builds and versions 425 and earlier for nightly builds suffer from use of a weak cryptographic algorithm (RSA/ECB/PKCS1Padding). The issue will be patched in v2.3 for release builds and 426 onwards for nightly builds. As a workaround, one may disable an advance security feature if not required.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-327
Published	2021-09-27
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: rucky project

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

Am I affected?

Timeline

2021-09-27 20:15 UTCPublished CVE record published
2026-06-17 04:07 UTCUpdated Record last modified

rucky project rucky UPGRADE

Affected: <= 2.2

Fixed in: newer than 2.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rucky

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-2021-41096?

rucky: upgrade to newer than 2.2. Exact commands for each OS are on this page.

Is CVE-2021-41096 being exploited?

CVE-2021-41096 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-2021-41096 affect?

CVE-2021-41096 affects rucky. Severity is high (CVSS 7.5). Rucky is a USB HID Rubber Ducky Launch Pad for Android. Versions 2.2 and earlier for release builds and versions 425 and earlier for nightly builds suffer from use of a weak cryptographic algorithm (RSA/ECB/PKCS1Padding). The issue will be

How urgent is CVE-2021-41096?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

Software pages

Android vulnerabilities

References

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