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Fencer Intel
medium 5.7

CVE-2021-22784 json

A CWE-306: Missing Authentication for Critical Function vulnerability exists in C-Bus Toolkit v1.15.8 and prior that could allow an attacke…

published 5y ago modified 4mo ago also EUVD-2021-9919

cvss
5.7
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
12.1%
EPSS 12.1% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

A CWE-306: Missing Authentication for Critical Function vulnerability exists in C-Bus Toolkit v1.15.8 and prior that could allow an attacker to use a crafted webpage to obtain remote access to the system.

Patch / fix

  • schneider-electric c-bus_toolkit 1.15.9

Is CVE-2021-22784 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-194-01 updated cvss 6.5

Schneider Electric C-Bus Toolkit

  • Schneider Electric Software, LLC C-Bus Toolkit <= 1.15.8
    affected: mitigation “Schneider Electric recommends users to update to Version 1.15.9 or later. Note: A reboot will be needed after the update.” se.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

12.08% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • tenable.com https://www.tenable.com/security/research/tra-2021-50 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

  • n/a C-Bus Toolkit v1.15.8 and prior

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.