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Fencer Vulns
high 8.7

CVE-2025-43876 json

iSTAR Ultra, Ultra SE, Ultra G2, Ultra G2 SE, iSTAR Edge G2 - Authenticated web application command injection - get8021xSettings

published 2025-12-24 10 mo ago modified 2026-10-07 32 d ago also EUVD-2025-205288

cvss
8.7
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

Under certain circumstances a successful exploitation could result in access to the device.

Vendor advisories

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

cisa ICSA-25-345-01 updated cvss 8.8

Johnson Controls iSTAR

  • Johnson Controls Inc. iSTAR Edge G2 <6.9.3 Johnson Controls Inc. iSTAR Ultra <6.9.7.CU01 Johnson Controls Inc. iSTAR Ultra G2 <6.9.3 Johnson Controls Inc. iSTAR Ultra G2 SE <6.9.3 Johnson Controls Inc. iSTAR Ultra SE <6.9.7.CU01
    affected: vendor fix, mitigation “Johnson Controls recommends users complete the following actions to address these issues:” johnsoncontrols.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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
10 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Johnson Controls iSTAR Ultra, iSTAR Ultra SE
  • Johnson Controls iSTAR Ultra G2, iSTAR Ultra G2 SE, iSTAR Edge G2

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Vulns 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.