CVE-2021-26705Public exploitNetwork attack vector

Administrative impersonation via unauthenticated RMI metadata

Published Mar 5, 2021 · Updated Aug 3, 2024

Authentication bypass in SquareBox CatDV Server 9.2 and earlier allows remote attackers to obtain administrative access through RMI. The RMI ServerAPI exposes getConnections without authentication, and its connection metadata permits calculation of a valid ClientID session token. Network access to the RMI registry on TCP port 1099 is sufficient to impersonate an active user and invoke administrative methods that disclose password hashes.

CVSS severity9.1
Critical
EPSS probability2.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in SquareBox CatDV Server 9.2 and earlier allows remote attackers to obtain administrative access through RMI. The RMI ServerAPI exposes getConnections without authentication, and its connection metadata permits calculation of a valid ClientID session token. Network access to the RMI registry on TCP port 1099 is sufficient to impersonate an active user and invoke administrative methods that disclose password hashes.

The record

CVE
CVE-2021-26705
Published
Mar 5, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1210Exploitation of Remote Services

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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