CVE-2021-41286: Omikron MultiCash Desktop 4.00.008.SP5 relies on a client-side authentication mechanism

Routine

HIGH 7.8DOWNGRADE

CVE-2021-41286 is a high-severity flaw (CVSS 7.8) affecting multicash. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Omikron MultiCash Desktop 4.00.008.SP5 relies on a client-side authentication mechanism. When a user logs into the application, the validity of the password is checked locally. All communication to the database backend is made via the same technical account. Consequently, an attacker can attach a debugger to the process or create a patch that manipulates the behavior of the login function. When the function always returns the success value (corre

Why this priority

High severity

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-287
Published	2021-10-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: omikron

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

Am I affected?

Timeline

2021-10-05 16:15 UTCPublished CVE record published
2026-06-17 04:08 UTCUpdated Record last modified

omikron multicash DOWNGRADE

Affected: 4.00.008 sp5

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.00.008

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.00.008 (Debian / Ubuntu)

apt-cache madison multicash sudo apt install multicash=<VERSION_BEFORE_4.00.008> sudo apt-mark hold multicash

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list multicash sudo dnf downgrade multicash-<VERSION_BEFORE_4.00.008> sudo dnf versionlock add multicash

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-41286?

multicash: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-41286 being exploited?

CVE-2021-41286 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-2021-41286 affect?

CVE-2021-41286 affects multicash. Severity is high (CVSS 7.8). Omikron MultiCash Desktop 4.00.008.SP5 relies on a client-side authentication mechanism. When a user logs into the application, the validity of the password is checked locally. All communication to the database backend is made via the same

How urgent is CVE-2021-41286?

Priority 31/100. High severity

References

← Back to latest CVEs