FKIE_CVE-2026-8673
Vulnerability from fkie_nvd - Published: 2026-05-22 14:16 - Updated: 2026-07-23 16:10
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.1 (Critical) - CVSS:3.1/
Summary
Unprotected transport of credentials vulnerability in syslink software AG Avantra on Linux, Windows allows Sniffing Attacks.
This issue affects Avantra: before 25.3.0.
References
| URL | Tags | ||
|---|---|---|---|
| vulnerability@ncsc.ch | https://support.avantra.com/hc/en-us/articles/5535621927071 | Mitigation, Vendor Advisory |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"platforms": [
"Linux",
"Windows"
],
"product": "Avantra",
"vendor": "syslink software AG",
"versions": [
{
"lessThan": "25.3.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"source": "vulnerability@ncsc.ch"
}
],
"configurations": [
{
"nodes": [
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"criteria": "cpe:2.3:a:avantra:avantra:*:*:*:*:*:*:*:*",
"matchCriteriaId": "FB2FFE5B-E526-4A40-9141-60B29AAD1E90",
"versionEndExcluding": "25.3.0",
"vulnerable": true
}
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"vulnerable": false
},
{
"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
"matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA",
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Unprotected transport of credentials vulnerability in syslink software AG Avantra on Linux, Windows allows Sniffing Attacks.\n\nThis issue affects Avantra: before 25.3.0."
},
{
"lang": "es",
"value": "Vulnerabilidad de transporte de credenciales no protegido en syslink software AG Avantra en Linux, Windows permite ataques de sniffing.\n\nEste problema afecta a Avantra: antes de 25.3.0."
}
],
"id": "CVE-2026-8673",
"lastModified": "2026-07-23T16:10:00.137",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
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"type": "Secondary"
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{
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
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"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.2,
"source": "nvd@nist.gov",
"type": "Primary"
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"ssvcV203": [
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"options": [
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{
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{
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],
"role": "CISA Coordinator",
"timestamp": "2026-05-22T15:03:57.514433Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-05-22T14:16:30.070",
"references": [
{
"source": "vulnerability@ncsc.ch",
"tags": [
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],
"url": "https://support.avantra.com/hc/en-us/articles/5535621927071"
}
],
"sourceIdentifier": "vulnerability@ncsc.ch",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-523"
}
],
"source": "vulnerability@ncsc.ch",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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