CVE-2025-56425Public exploitNetwork attack vector

Email forgery via unfiltered SMTP receiver input

Published Jan 8, 2026 · Updated Jan 8, 2026

SMTP command injection in enaio AppConnector 10.10, 11.0, and 11.10 allows remote authenticated users to forge email via sendmail. The sendmail endpoint inserts the receiver value into its SMTP exchange without filtering CRLF sequences, allowing injected DATA and message headers. A valid enaio session is required; the attacker can choose the displayed sender, recipients, subject, and HTML body to send forged messages.

CVSS severity9.1
Critical
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SMTP command injection in enaio AppConnector 10.10, 11.0, and 11.10 allows remote authenticated users to forge email via sendmail. The sendmail endpoint inserts the receiver value into its SMTP exchange without filtering CRLF sequences, allowing injected DATA and message headers. A valid enaio session is required; the attacker can choose the displayed sender, recipients, subject, and HTML body to send forged messages.

The record

CVE
CVE-2025-56425
Published
Jan 8, 2026
Updated
Jan 8, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1566.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1566.002Spearphishing Link

Public exploit references

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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