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Fencer Vulns
critical 9.8

CVE-2025-3699 json

Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation G-50 all versions, G-50-W all versions, G-50A…

published 2025-06-26 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-19244

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation G-50 all versions, G-50-W all versions, G-50A all versions, GB-50 all versions, GB-50A all versions, GB-24A all versions, G-150AD all versions, AG-150A-A all versions, AG-150A-J all versions, GB-50AD all versions, GB-50ADA-A all versions, GB-50ADA-J all versions, EB-50GU-A all versions, EB-50GU-J all versions, AE-200J all versions, AE-200A all versions, AE-200E all versions, AE-50J all versions, AE-50A all versions, AE-50E all versions, EW-50J all versions, EW-50A all versions, EW-50E all versions, TE-200A all versions, TE-50A all versions, TW-50A all versions, and CMS-RMD-J all versions allows a remote unauthenticated attacker to bypass authentication and then control the air conditioning systems illegally, or disclose information in them by exploiting this vulnerability. In addition, the attacker may tamper with firmware for them using the disclosed information.

Vendor advisories

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

cisa ICSA-25-177-01 updated cvss 9.8

Mitsubishi Electric Air Conditioning Systems (Update B)

  • Mitsubishi Electric AE-50A Mitsubishi Electric AE-50E Mitsubishi Electric AE-50J Mitsubishi Electric AE-200A Mitsubishi Electric AE-200E Mitsubishi Electric AE-200J
    affected: vendor fix, mitigation “Restrict access to air conditioning systems from untrusted networks and hosts.” mitsubishielectric.com
  • Mitsubishi Electric AG-150A-A Mitsubishi Electric AG-150A-J Mitsubishi Electric CMS-RMD-J Mitsubishi Electric EB-50GU-A Mitsubishi Electric EB-50GU-J
    affected: mitigation “Restrict access to air conditioning systems from untrusted networks and hosts.” mitsubishielectric.com
  • Mitsubishi Electric EW-50A Mitsubishi Electric EW-50E Mitsubishi Electric EW-50J
    affected: vendor fix, mitigation “Restrict access to air conditioning systems from untrusted networks and hosts.” mitsubishielectric.com
  • Mitsubishi Electric G-50 Mitsubishi Electric G-50-W Mitsubishi Electric G-50A Mitsubishi Electric G-150AD Mitsubishi Electric GB-24A Mitsubishi Electric GB-50
    +4 more products
    Mitsubishi Electric GB-50A Mitsubishi Electric GB-50AD Mitsubishi Electric GB-50ADA-A Mitsubishi Electric GB-50ADA-J
    affected: mitigation “Restrict access to air conditioning systems from untrusted networks and hosts.” mitsubishielectric.com
  • Mitsubishi Electric TE-50A Mitsubishi Electric TE-200A Mitsubishi Electric TW-50A
    affected: vendor fix, mitigation “Restrict access to air conditioning systems from untrusted networks and hosts.” mitsubishielectric.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
16 mo ago

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Mitsubishi Electric Corporation G-50
  • Mitsubishi Electric Corporation G-50-W
  • Mitsubishi Electric Corporation G-50A
  • Mitsubishi Electric Corporation GB-50
  • Mitsubishi Electric Corporation GB-50A
  • Mitsubishi Electric Corporation GB-24A
  • Mitsubishi Electric Corporation G-150AD
  • Mitsubishi Electric Corporation AG-150A-A
  • Mitsubishi Electric Corporation AG-150A-J
  • Mitsubishi Electric Corporation GB-50AD
  • Mitsubishi Electric Corporation GB-50ADA-A
  • Mitsubishi Electric Corporation GB-50ADA-J
  • Mitsubishi Electric Corporation EB-50GU-A
  • Mitsubishi Electric Corporation EB-50GU-J
  • Mitsubishi Electric Corporation AE-200J
  • Mitsubishi Electric Corporation AE-200A
  • Mitsubishi Electric Corporation AE-200E
  • Mitsubishi Electric Corporation AE-50J
  • Mitsubishi Electric Corporation AE-50A
  • Mitsubishi Electric Corporation AE-50E
  • Mitsubishi Electric Corporation EW-50J
  • Mitsubishi Electric Corporation EW-50A
  • Mitsubishi Electric Corporation EW-50E
  • Mitsubishi Electric Corporation TE-200A
  • Mitsubishi Electric Corporation TE-50A
  • Mitsubishi Electric Corporation TW-50A
  • Mitsubishi Electric Corporation CMS-RMD-J

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

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.