syslink Avantra up to 25.2.x on Linux/Windows unprotected transport of credentials

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in syslink Avantra up to 25.2.x on Linux/Windows. This impacts an unknown function. Such manipulation leads to unprotected transport of credentials. This vulnerability is listed as CVE-2026-8673. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in syslink Avantra up to 25.2.x on Linux/Windows and classified as problematic. Affected by this issue is an unknown functionality. The manipulation with an unknown input leads to a unprotected transport of credentials vulnerability. Using CWE to declare the problem leads to CWE-523. Login pages do not use adequate measures to protect the user name and password while they are in transit from the client to the server. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Unprotected transport of credentials vulnerability in syslink software AG Avantra on Linux, Windows allows Sniffing Attacks. This issue affects Avantra: before 25.3.0.

The advisory is available at support.avantra.com. This vulnerability is handled as CVE-2026-8673 since 05/15/2026. The exploitation is known to be difficult. The attack may be launched remotely. Additional levels of successful authentication are necessary for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1557 by the MITRE ATT&CK project.

Upgrading to version 25.3.0 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.1
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.9
CNA Vector (NCSC.ch): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Unprotected transport of credentials
CWE: CWE-523 / CWE-522
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Avantra 25.3.0

Timelineinfo

05/15/2026 CVE reserved
05/22/2026 +7 days Advisory disclosed
05/22/2026 +0 days VulDB entry created
05/22/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: support.avantra.com
Status: Confirmed

CVE: CVE-2026-8673 (🔒)
GCVE (CVE): GCVE-0-2026-8673
GCVE (VulDB): GCVE-100-365198

Entryinfo

Created: 05/22/2026 15:57
Changes: 05/22/2026 15:57 (63)
Complete: 🔍
Cache ID: 216::103

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