CVE-2021-26705: An issue was discovered in SquareBox CatDV Server through 9.2

Q: How do I fix CVE-2021-26705?

catdv: upgrade to newer than 9.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-26705 being exploited?

CVE-2021-26705 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-2021-26705 affect?

CVE-2021-26705 affects catdv. Severity is critical (CVSS 9.1). An issue was discovered in SquareBox CatDV Server through 9.2. An attacker can invoke sensitive RMI methods such as getConnections without authentication, the results of which can be used to generate valid authentication tokens. These token

Q: How urgent is CVE-2021-26705?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.1REMOTEUPGRADE

CVE-2021-26705 is a critical-severity flaw (CVSS 9.1) affecting catdv. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in SquareBox CatDV Server through 9.2. An attacker can invoke sensitive RMI methods such as getConnections without authentication, the results of which can be used to generate valid authentication tokens. These tokens can then be used to invoke administrative tasks within the application, such as disclosing password hashes.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 19%)
CISA exploited list	No
Weakness	CWE-306
Published	2021-03-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: squarebox

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

Am I affected?

Timeline

2021-03-05 19:15 UTCPublished CVE record published
2026-06-17 03:43 UTCUpdated Record last modified

squarebox catdv UPGRADE

Affected: <= 9.2

Fixed in: newer than 9.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 9.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade catdv

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-2021-26705?

catdv: upgrade to newer than 9.2. Exact commands for each OS are on this page.

Is CVE-2021-26705 being exploited?

CVE-2021-26705 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-2021-26705 affect?

CVE-2021-26705 affects catdv. Severity is critical (CVSS 9.1). An issue was discovered in SquareBox CatDV Server through 9.2. An attacker can invoke sensitive RMI methods such as getConnections without authentication, the results of which can be used to generate valid authentication tokens. These token

How urgent is CVE-2021-26705?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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