CVE-2022-50923: Cobian Backup 0.9 contains an unquoted service path vulnerability that allows local users to execute arbitrary

Routine

HIGH 7.8DOWNGRADE

CVE-2022-50923 is a high-severity flaw (CVSS 7.8) affecting cobian backup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cobian Backup 0.9 contains an unquoted service path vulnerability that allows local users to execute arbitrary code with elevated system privileges. Attackers can exploit the unquoted binary path in the CobianReflectorService to inject malicious code that will execute with LocalSystem permissions during service startup.

Why this priority

High severity
Public exploit reference

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-428
Published	2026-01-13
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: cobiansoft

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

Am I affected?

Timeline

2026-01-13 23:15 UTCPublished CVE record published
2026-06-17 05:24 UTCUpdated Record last modified

cobiansoft cobian backup DOWNGRADE

Affected: 0.9.93

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.93

1. Check installed version

apt-cache policy cobian-backup || rpm -q cobian-backup || cobian-backup --version

2. No fixed release: DOWNGRADE to a release before 0.9.93 (Debian / Ubuntu)

apt-cache madison cobian-backup sudo apt install cobian-backup=<VERSION_BEFORE_0.9.93> sudo apt-mark hold cobian-backup

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

dnf --showduplicates list cobian-backup sudo dnf downgrade cobian-backup-<VERSION_BEFORE_0.9.93> sudo dnf versionlock add cobian-backup

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-2022-50923?

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

Is CVE-2022-50923 being exploited?

CVE-2022-50923 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-2022-50923 affect?

CVE-2022-50923 affects cobian backup. Severity is high (CVSS 7.8). Cobian Backup 0.9 contains an unquoted service path vulnerability that allows local users to execute arbitrary code with elevated system privileges. Attackers can exploit the unquoted binary path in the CobianReflectorService to inject mali

How urgent is CVE-2022-50923?

Priority 36/100. High severity; Public exploit reference

References

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