CVE-2026-8673Network attack vector

Credential disclosure via plaintext password email

Published May 22, 2026 · Updated May 22, 2026

Unprotected credential transport in Avantra before 25.3.0 allows attackers to read re-initialized passwords from intercepted email. The NewUserEmailPassword template inserts the ${password} value into email, transmitting the credential in plaintext. Exposure requires that placeholder to remain configured and access to the email path or delivery system; captured passwords enable account access.

CVSS severity5.9
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unprotected credential transport in Avantra before 25.3.0 allows attackers to read re-initialized passwords from intercepted email. The NewUserEmailPassword template inserts the ${password} value into email, transmitting the credential in plaintext. Exposure requires that placeholder to remain configured and access to the email path or delivery system; captured passwords enable account access.

The record

CVE
CVE-2026-8673
Published
May 22, 2026
Updated
May 22, 2026
Vendor
Syslink Software AG
Product
Avantra
Classifications
CWE-523, CAPEC-157, T1040
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. May 22, 2026CVE publishedPublication date reported by the CVE source.
  2. May 22, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <25.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Syslink Software AG · Avantraversion=0 <25.3.0

Published CVSS scores

9.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
5.9Switzerland Government Common Vulnerability ProgramCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-523Unprotected Transport of Credentials
CAPEC-157Sniffing Attacks
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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