CVE-2022-50689: Cobian Reflector 0.9.93 RC1 contains a denial of service vulnerability that allows attackers to crash the appl

Routine

MEDIUM 6.2DOWNGRADE

CVE-2022-50689 is a medium-severity flaw (CVSS 6.2) affecting reflector. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cobian Reflector 0.9.93 RC1 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the password input field. Attackers can paste a large 8000-byte buffer into the password field to trigger an application crash during SFTP task configuration.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-120
Published	2025-12-22
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

2025-12-22 22:15 UTCPublished CVE record published
2026-06-17 05:24 UTCUpdated Record last modified

cobiansoft reflector DOWNGRADE

Affected: 0.9.93 rc1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.93

1. Check installed version

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

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

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

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

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

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-2022-50689?

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

Is CVE-2022-50689 being exploited?

CVE-2022-50689 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-2022-50689 affect?

CVE-2022-50689 affects reflector. Severity is medium (CVSS 6.2). Cobian Reflector 0.9.93 RC1 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the password input field. Attackers can paste a large 8000-byte buffer into the password field to trigger a

How urgent is CVE-2022-50689?

Priority 30/100. Public exploit reference

References

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