CVE-2025-58107Network attack vector

Credential disclosure via cleartext ActiveSync transmission

Published Mar 2, 2026 · Updated Mar 2, 2026

Cleartext transmission in Microsoft Exchange through 2019 allows attackers to read Samsung mobile users' credentials during EAS synchronization. Affected on-premises EAS configurations send the user's name, email address, device ID, bearer token, and base64-encoded password without transport encryption. Network-path access to the client-server channel is required; exposure is limited to confidentiality, including reusable credentials and tokens.

CVSS severity7.5
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Microsoft Exchange through 2019 allows attackers to read Samsung mobile users' credentials during EAS synchronization. Affected on-premises EAS configurations send the user's name, email address, device ID, bearer token, and base64-encoded password without transport encryption. Network-path access to the client-server channel is required; exposure is limited to confidentiality, including reusable credentials and tokens.

The record

CVE
CVE-2025-58107
Published
Mar 2, 2026
Updated
Mar 2, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-319, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 2, 2026Record 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

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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