CVE-2020-26146 (GCVE-0-2020-26146)
Vulnerability from cvelistv5 – Published: 2021-05-11 19:39 – Updated: 2026-06-02 13:53
VLAI
EPSS
VEX
Summary
An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WPA, WPA2, and WPA3 implementations reassemble fragments with non-consecutive packet numbers. An adversary can abuse this to exfiltrate selected fragments. This vulnerability is exploitable when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used. Note that WEP is vulnerable to this attack by design.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 13:52 UTC
CWE
- n/a
- CWE-20 - Improper Input Validation
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://tools.cisco.com/security/center/content/C… | vendor-advisoryx_refsource_CISCO |
| https://www.fragattacks.com | x_refsource_MISC |
| https://github.com/vanhoefm/fragattacks/blob/mast… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2021/0… | mailing-listx_refsource_MLIST |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| https://www.arista.com/en/support/advisories-noti… | x_refsource_MISC |
| https://cert-portal.siemens.com/productcert/html/… | |
| https://cert-portal.siemens.com/productcert/html/… |
Impacted products
39 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Siemens | SCALANCE W1748-1 M12 |
Affected:
0 , < V3.0.0
(custom)
|
guessed | |
| Siemens | SCALANCE W1750D (JP) |
Affected:
0 , < V8.7.1.3
(custom)
|
guessed | |
| Siemens | SCALANCE W1750D (ROW) |
Affected:
0 , < V8.7.1.3
(custom)
|
guessed | |
| Siemens | SCALANCE W1750D (USA) |
Affected:
0 , < V8.7.1.3
(custom)
|
guessed | |
| Siemens | SCALANCE W1788-1 M12 |
Affected:
0 , < V3.0.0
(custom)
|
guessed | |
| Siemens | SCALANCE W1788-2 EEC M12 |
Affected:
0 , < V3.0.0
(custom)
|
guessed | |
| Siemens | SCALANCE W1788-2 M12 |
Affected:
0 , < V3.0.0
(custom)
|
guessed | |
| Siemens | SCALANCE W1788-2IA M12 |
Affected:
0 , < V3.0.0
(custom)
|
guessed | |
| Siemens | SCALANCE W721-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W722-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W734-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W734-1 RJ45 (USA) |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W738-1 M12 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W748-1 M12 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W748-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W761-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W774-1 M12 EEC |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W774-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W774-1 RJ45 (USA) |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W778-1 M12 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W778-1 M12 EEC |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W778-1 M12 EEC (USA) |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W786-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W786-2 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W786-2 SFP |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W786-2IA RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W788-1 M12 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W788-1 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W788-2 M12 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W788-2 M12 EEC |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE W788-2 RJ45 |
Affected:
0 , < V6.6.0
(custom)
|
guessed | |
| Siemens | SCALANCE WAM763-1 |
Affected:
0 , < V1.2.0
(custom)
|
guessed | |
| Siemens | SCALANCE WAM766-1 |
Affected:
0 , < V1.2.0
(custom)
|
guessed | |
| Siemens | SCALANCE WAM766-1 (US) |
Affected:
0 , < V1.2.0
(custom)
|
guessed | |
| Siemens | SCALANCE WAM766-1 EEC |
Affected:
0 , < V1.2.0
(custom)
|
guessed | |
| Siemens | SCALANCE WAM766-1 EEC (US) |
Affected:
0 , < V1.2.0
(custom)
|
guessed | |
| Siemens | SCALANCE WUM763-1 |
Affected:
0 , < V1.2.0
(custom)
|
guessed | |
| Siemens | SCALANCE WUM766-1 |
Affected:
0 , < V1.2.0
(custom)
|
guessed | |
| Siemens | SCALANCE WUM766-1 (USA) |
Affected:
0 , < V1.2.0
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T15:49:07.202Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
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"references": [
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"name": "20210511 Multiple Vulnerabilities in Frame Aggregation and Fragmentation Implementations of 802.11 Specification Affecting Cisco Products: May 2021",
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{
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{
"tags": [
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"url": "https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63"
}
],
"title": "CVE Program Container"
},
{
"affected": [
{
"defaultStatus": "unknown",
"product": "SCALANCE W1748-1 M12",
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"versions": [
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{
"defaultStatus": "unknown",
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"versions": [
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"status": "affected",
"version": "0",
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},
{
"defaultStatus": "unknown",
"product": "SCALANCE W1750D (JP)",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V8.7.1.3",
"status": "affected",
"version": "0",
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},
{
"defaultStatus": "unknown",
"product": "SCALANCE W1750D (ROW)",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V8.7.1.3",
"status": "affected",
"version": "0",
"versionType": "custom"
}
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},
{
"defaultStatus": "unknown",
"product": "SCALANCE W1750D (USA)",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V8.7.1.3",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W1788-1 M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V3.0.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W1788-2 EEC M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V3.0.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
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},
{
"defaultStatus": "unknown",
"product": "SCALANCE W1788-2 M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V3.0.0",
"status": "affected",
"version": "0",
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]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W1788-2IA M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V3.0.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W721-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W721-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W721-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W721-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W722-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W722-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
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]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W722-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W722-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W722-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W722-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
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},
{
"defaultStatus": "unknown",
"product": "SCALANCE W734-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
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"product": "SCALANCE W734-1 RJ45",
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"status": "affected",
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"lessThan": "V6.6.0",
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"product": "SCALANCE W734-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W734-1 RJ45 (USA)",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W734-1 RJ45 (USA)",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W738-1 M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W738-1 M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W738-1 M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W738-1 M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W748-1 M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W748-1 M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W748-1 M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W748-1 M12",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W748-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W748-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W748-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W748-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W761-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W761-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W761-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W761-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 M12 EEC",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 M12 EEC",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 M12 EEC",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 M12 EEC",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SCALANCE W774-1 RJ45",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V6.6.0",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
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"id": "CVE-2020-26146",
"lastModified": "2024-11-21T05:19:22.133",
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"published": "2021-05-11T20:15:08.907",
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"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-28T11:57:21+00:00",
"cve": "CVE-2020-26146",
"id": "CVE-2020-26146",
"initial_release_date": "2020-01-01T00:00:00+00:00",
"product_status:fixed": "150",
"product_status:known_affected": "150",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: reassembling encrypted fragments with non-consecutive packet numbers",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-26146.json",
"version": "3"
},
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"current_release_date": "2026-09-02T02:28:52Z",
"cve": "CVE-2020-26146",
"id": "CVE-2020-26146",
"initial_release_date": "2023-02-15T03:53:20Z",
"product_status:known_affected": "22",
"product_status:known_not_affected": "174",
"product_status:recommended": "20",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2020-26146",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-26146.json",
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}
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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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