CVE-2019-12813: An issue was discovered in Digital Persona U.are.U 4500 Fingerprint Reader v24

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MEDIUM 5.9REMOTEMITIGATE

CVE-2019-12813 is a medium-severity flaw (CVSS 5.9) affecting digital persona u.are.u 4500 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Digital Persona U.are.U 4500 Fingerprint Reader v24. The key and salt used for obfuscating the fingerprint image exhibit cleartext when the fingerprint scanner device transfers a fingerprint image to the driver. An attacker who sniffs an encrypted fingerprint image can easily decrypt that image using the key and salt.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-319
Published	2019-06-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: crossmatch

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

Am I affected?

Timeline

2019-06-13 23:29 UTCPublished CVE record published
2026-06-17 02:15 UTCUpdated Record last modified

crossmatch digital persona u.are.u 4500 firmware MITIGATE

Affected: 24

Fixed in: no fixed release known

Safe to downgrade to: a release before 24

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2019-12813?

digital persona u.are.u 4500 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-12813 being exploited?

CVE-2019-12813 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-2019-12813 affect?

CVE-2019-12813 affects digital persona u.are.u 4500 firmware. Severity is medium (CVSS 5.9). An issue was discovered in Digital Persona U.are.U 4500 Fingerprint Reader v24. The key and salt used for obfuscating the fingerprint image exhibit cleartext when the fingerprint scanner device transfers a fingerprint image to the driver. A

How urgent is CVE-2019-12813?

Priority 47/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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