CVE-2025-27827Network attack vector

Unauthenticated chat disclosure via mishandled session data

Published Jun 24, 2025 · Updated Jun 24, 2025

Information disclosure in Mitel MiContact Center Business Legacy Chat 10.2.0.3 and earlier allows remote attackers to access active chat data. The component improperly handles session data, exposing active chat rooms and permitting unauthorized reading and message sending during an active session. Exploitation requires user interaction and an enabled Legacy Chat deployment; Mitel has not disclosed the specific session-handling operation.

CVSS severity7.1
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Mitel MiContact Center Business Legacy Chat 10.2.0.3 and earlier allows remote attackers to access active chat data. The component improperly handles session data, exposing active chat rooms and permitting unauthorized reading and message sending during an active session. Exploitation requires user interaction and an enabled Legacy Chat deployment; Mitel has not disclosed the specific session-handling operation.

The record

CVE
CVE-2025-27827
Published
Jun 24, 2025
Updated
Jun 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2025Record 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

7.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
7.1Mitel PSIRTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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