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GHSA-G4WR-69XR-36P6
Vulnerability from github – Published: 2025-09-24 18:30 – Updated: 2025-09-24 18:30
VLAI?
Details
A vulnerability in the implementation of the TACACS+ protocol in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to view sensitive data or bypass authentication.
This vulnerability exists because the system does not properly check whether the required TACACS+ shared secret is configured. A machine-in-the-middle attacker could exploit this vulnerability by intercepting and reading unencrypted TACACS+ messages or impersonating the TACACS+ server and falsely accepting arbitrary authentication requests. A successful exploit could allow the attacker to view sensitive information in a TACACS+ message or bypass authentication and gain access to the affected device.
Severity ?
8.1 (High)
{
"affected": [],
"aliases": [
"CVE-2025-20160"
],
"database_specific": {
"cwe_ids": [
"CWE-287"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-24T18:15:34Z",
"severity": "HIGH"
},
"details": "A vulnerability in the implementation of the TACACS+ protocol in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to view sensitive data or bypass authentication. \n\n This vulnerability exists because the system does not properly check whether the required TACACS+ shared secret is configured. A machine-in-the-middle attacker could exploit this vulnerability by intercepting and reading unencrypted TACACS+ messages or impersonating the TACACS+ server and falsely accepting arbitrary authentication requests. A successful exploit could allow the attacker to view sensitive information in a TACACS+ message or bypass authentication and gain access to the affected device.",
"id": "GHSA-g4wr-69xr-36p6",
"modified": "2025-09-24T18:30:31Z",
"published": "2025-09-24T18:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-20160"
},
{
"type": "WEB",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-tacacs-hdB7thJw"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
CVE-2025-20160 (GCVE-0-2025-20160)
Vulnerability from cvelistv5 – Published: 2025-09-24 17:10 – Updated: 2025-10-01 16:49
VLAI?
EPSS
Summary
A vulnerability in the implementation of the TACACS+ protocol in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to view sensitive data or bypass authentication.
This vulnerability exists because the system does not properly check whether the required TACACS+ shared secret is configured. A machine-in-the-middle attacker could exploit this vulnerability by intercepting and reading unencrypted TACACS+ messages or impersonating the TACACS+ server and falsely accepting arbitrary authentication requests. A successful exploit could allow the attacker to view sensitive information in a TACACS+ message or bypass authentication and gain access to the affected device.
Severity ?
8.1 (High)
CWE
- CWE-287 - Improper Authentication
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Cisco | IOS |
Affected:
15.2(6)E1
Affected: 15.2(4)E6 Affected: 15.2(6)E2 Affected: 15.2(4)E7 Affected: 15.2(7)E Affected: 15.2(4)E8 Affected: 15.2(6)E2a Affected: 15.2(6)E2b Affected: 15.2(7)E1 Affected: 15.2(7)E0a Affected: 15.2(7)E0b Affected: 15.2(7)E0s Affected: 15.2(6)E3 Affected: 15.2(4)E9 Affected: 15.2(7)E2 Affected: 15.2(7a)E0b Affected: 15.2(4)E10 Affected: 15.2(7)E3 Affected: 15.2(7)E1a Affected: 15.2(7b)E0b Affected: 15.2(7)E2a Affected: 15.2(4)E10a Affected: 15.2(7)E4 Affected: 15.2(7)E3k Affected: 15.2(8)E Affected: 15.2(8)E1 Affected: 15.2(7)E5 Affected: 15.2(7)E6 Affected: 15.2(8)E2 Affected: 15.2(4)E10d Affected: 15.2(7)E7 Affected: 15.2(8)E3 Affected: 15.2(7)E8 Affected: 15.2(8)E4 Affected: 15.2(7)E9 Affected: 15.2(8)E5 Affected: 15.2(8)E6 Affected: 15.2(7)E10 Affected: 15.2(7)E11 Affected: 15.2(8)E7 Affected: 15.2(7)E12 Affected: 15.5(3)S8 Affected: 15.5(3)S9 Affected: 15.5(3)S10 Affected: 15.5(3)S9a Affected: 15.2(6)EB Affected: 15.5(3)M7 Affected: 15.5(3)M8 Affected: 15.5(3)M9 Affected: 15.5(3)M10 Affected: 15.6(2)SP5 Affected: 15.6(2)SP6 Affected: 15.6(2)SP7 Affected: 15.6(2)SP8 Affected: 15.6(2)SP9 Affected: 15.6(3)M4 Affected: 15.6(3)M5 Affected: 15.6(3)M6 Affected: 15.6(3)M7 Affected: 15.6(3)M6a Affected: 15.6(3)M6b Affected: 15.6(3)M8 Affected: 15.6(3)M9 Affected: 15.5(1)SY2 Affected: 15.5(1)SY3 Affected: 15.5(1)SY4 Affected: 15.5(1)SY5 Affected: 15.5(1)SY6 Affected: 15.5(1)SY7 Affected: 15.5(1)SY8 Affected: 15.5(1)SY9 Affected: 15.5(1)SY10 Affected: 15.5(1)SY11 Affected: 15.5(1)SY12 Affected: 15.5(1)SY13 Affected: 15.5(1)SY14 Affected: 15.5(1)SY15 Affected: 15.7(3)M3 Affected: 15.7(3)M2 Affected: 15.7(3)M4 Affected: 15.7(3)M5 Affected: 15.7(3)M4a Affected: 15.7(3)M4b Affected: 15.7(3)M6 Affected: 15.7(3)M7 Affected: 15.7(3)M8 Affected: 15.7(3)M9 Affected: 15.8(3)M Affected: 15.8(3)M1 Affected: 15.8(3)M0a Affected: 15.8(3)M0b Affected: 15.8(3)M2 Affected: 15.8(3)M1a Affected: 15.8(3)M3 Affected: 15.8(3)M2a Affected: 15.8(3)M4 Affected: 15.8(3)M3a Affected: 15.8(3)M3b Affected: 15.8(3)M5 Affected: 15.8(3)M6 Affected: 15.8(3)M7 Affected: 15.8(3)M8 Affected: 15.8(3)M9 Affected: 15.9(3)M Affected: 15.9(3)M1 Affected: 15.9(3)M0a Affected: 15.9(3)M2 Affected: 15.9(3)M3 Affected: 15.9(3)M2a Affected: 15.9(3)M3a Affected: 15.9(3)M4 Affected: 15.9(3)M3b Affected: 15.9(3)M5 Affected: 15.9(3)M4a Affected: 15.9(3)M6 Affected: 15.9(3)M7 Affected: 15.9(3)M6a Affected: 15.9(3)M6b Affected: 15.9(3)M8 Affected: 15.9(3)M7a Affected: 15.9(3)M9 Affected: 15.9(3)M8b Affected: 15.9(3)M10 Affected: 15.9(3)M11 |
|||||||
|
|||||||||
{
"containers": {
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"other": {
"content": {
"id": "CVE-2025-20160",
"options": [
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{
"Automatable": "no"
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{
"Technical Impact": "total"
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"role": "CISA Coordinator",
"timestamp": "2025-09-24T00:00:00+00:00",
"version": "2.0.3"
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"title": "CISA ADP Vulnrichment"
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},
{
"status": "affected",
"version": "16.12.1w"
},
{
"status": "affected",
"version": "16.12.2"
},
{
"status": "affected",
"version": "16.12.1y"
},
{
"status": "affected",
"version": "16.12.2a"
},
{
"status": "affected",
"version": "16.12.3"
},
{
"status": "affected",
"version": "16.12.8"
},
{
"status": "affected",
"version": "16.12.2s"
},
{
"status": "affected",
"version": "16.12.1x"
},
{
"status": "affected",
"version": "16.12.1t"
},
{
"status": "affected",
"version": "16.12.4"
},
{
"status": "affected",
"version": "16.12.3s"
},
{
"status": "affected",
"version": "16.12.3a"
},
{
"status": "affected",
"version": "16.12.4a"
},
{
"status": "affected",
"version": "16.12.5"
},
{
"status": "affected",
"version": "16.12.6"
},
{
"status": "affected",
"version": "16.12.1z1"
},
{
"status": "affected",
"version": "16.12.5a"
},
{
"status": "affected",
"version": "16.12.5b"
},
{
"status": "affected",
"version": "16.12.1z2"
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{
"status": "affected",
"version": "16.12.6a"
},
{
"status": "affected",
"version": "16.12.7"
},
{
"status": "affected",
"version": "16.12.9"
},
{
"status": "affected",
"version": "16.12.10"
},
{
"status": "affected",
"version": "16.12.10a"
},
{
"status": "affected",
"version": "16.12.11"
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{
"status": "affected",
"version": "16.12.12"
},
{
"status": "affected",
"version": "16.12.13"
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{
"status": "affected",
"version": "3.11.0E"
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{
"status": "affected",
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{
"status": "affected",
"version": "3.11.2E"
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{
"status": "affected",
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{
"status": "affected",
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{
"status": "affected",
"version": "3.11.4E"
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{
"status": "affected",
"version": "3.11.3aE"
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{
"status": "affected",
"version": "3.11.5E"
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{
"status": "affected",
"version": "3.11.6E"
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{
"status": "affected",
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{
"status": "affected",
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{
"status": "affected",
"version": "3.11.9E"
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{
"status": "affected",
"version": "3.11.10E"
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{
"status": "affected",
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{
"status": "affected",
"version": "3.11.12E"
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{
"status": "affected",
"version": "17.1.1"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.1.1s"
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{
"status": "affected",
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{
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{
"status": "affected",
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{
"status": "affected",
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},
{
"status": "affected",
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{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.2.3"
},
{
"status": "affected",
"version": "17.3.1"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.3.3"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.3.1w"
},
{
"status": "affected",
"version": "17.3.2a"
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{
"status": "affected",
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},
{
"status": "affected",
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{
"status": "affected",
"version": "17.3.4"
},
{
"status": "affected",
"version": "17.3.5"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.3.6"
},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.3.5a"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.3.7"
},
{
"status": "affected",
"version": "17.3.8"
},
{
"status": "affected",
"version": "17.3.8a"
},
{
"status": "affected",
"version": "17.4.1"
},
{
"status": "affected",
"version": "17.4.2"
},
{
"status": "affected",
"version": "17.4.1a"
},
{
"status": "affected",
"version": "17.4.1b"
},
{
"status": "affected",
"version": "17.4.2a"
},
{
"status": "affected",
"version": "17.5.1"
},
{
"status": "affected",
"version": "17.5.1a"
},
{
"status": "affected",
"version": "17.6.1"
},
{
"status": "affected",
"version": "17.6.2"
},
{
"status": "affected",
"version": "17.6.1w"
},
{
"status": "affected",
"version": "17.6.1a"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.6.3"
},
{
"status": "affected",
"version": "17.6.1y"
},
{
"status": "affected",
"version": "17.6.1z"
},
{
"status": "affected",
"version": "17.6.3a"
},
{
"status": "affected",
"version": "17.6.4"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.6.5"
},
{
"status": "affected",
"version": "17.6.6"
},
{
"status": "affected",
"version": "17.6.6a"
},
{
"status": "affected",
"version": "17.6.5a"
},
{
"status": "affected",
"version": "17.6.7"
},
{
"status": "affected",
"version": "17.6.8"
},
{
"status": "affected",
"version": "17.6.8a"
},
{
"status": "affected",
"version": "17.7.1"
},
{
"status": "affected",
"version": "17.7.1a"
},
{
"status": "affected",
"version": "17.7.1b"
},
{
"status": "affected",
"version": "17.7.2"
},
{
"status": "affected",
"version": "17.10.1"
},
{
"status": "affected",
"version": "17.10.1a"
},
{
"status": "affected",
"version": "17.10.1b"
},
{
"status": "affected",
"version": "17.8.1"
},
{
"status": "affected",
"version": "17.8.1a"
},
{
"status": "affected",
"version": "17.9.1"
},
{
"status": "affected",
"version": "17.9.1w"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.9.1a"
},
{
"status": "affected",
"version": "17.9.1x"
},
{
"status": "affected",
"version": "17.9.1y"
},
{
"status": "affected",
"version": "17.9.3"
},
{
"status": "affected",
"version": "17.9.2a"
},
{
"status": "affected",
"version": "17.9.1x1"
},
{
"status": "affected",
"version": "17.9.3a"
},
{
"status": "affected",
"version": "17.9.4"
},
{
"status": "affected",
"version": "17.9.1y1"
},
{
"status": "affected",
"version": "17.9.5"
},
{
"status": "affected",
"version": "17.9.4a"
},
{
"status": "affected",
"version": "17.9.5a"
},
{
"status": "affected",
"version": "17.9.5b"
},
{
"status": "affected",
"version": "17.9.6"
},
{
"status": "affected",
"version": "17.9.6a"
},
{
"status": "affected",
"version": "17.9.7"
},
{
"status": "affected",
"version": "17.9.5e"
},
{
"status": "affected",
"version": "17.9.5f"
},
{
"status": "affected",
"version": "17.9.7a"
},
{
"status": "affected",
"version": "17.9.7b"
},
{
"status": "affected",
"version": "17.11.1"
},
{
"status": "affected",
"version": "17.11.1a"
},
{
"status": "affected",
"version": "17.12.1"
},
{
"status": "affected",
"version": "17.12.1w"
},
{
"status": "affected",
"version": "17.12.1a"
},
{
"status": "affected",
"version": "17.12.1x"
},
{
"status": "affected",
"version": "17.12.2"
},
{
"status": "affected",
"version": "17.12.3"
},
{
"status": "affected",
"version": "17.12.2a"
},
{
"status": "affected",
"version": "17.12.1y"
},
{
"status": "affected",
"version": "17.12.1z"
},
{
"status": "affected",
"version": "17.12.4"
},
{
"status": "affected",
"version": "17.12.3a"
},
{
"status": "affected",
"version": "17.12.1z1"
},
{
"status": "affected",
"version": "17.12.1z2"
},
{
"status": "affected",
"version": "17.12.4a"
},
{
"status": "affected",
"version": "17.12.5"
},
{
"status": "affected",
"version": "17.12.4b"
},
{
"status": "affected",
"version": "17.12.1z3"
},
{
"status": "affected",
"version": "17.12.5a"
},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.12.5c"
},
{
"status": "affected",
"version": "17.13.1"
},
{
"status": "affected",
"version": "17.13.1a"
},
{
"status": "affected",
"version": "17.14.1"
},
{
"status": "affected",
"version": "17.14.1a"
},
{
"status": "affected",
"version": "17.11.99SW"
},
{
"status": "affected",
"version": "17.15.1"
},
{
"status": "affected",
"version": "17.15.1w"
},
{
"status": "affected",
"version": "17.15.1a"
},
{
"status": "affected",
"version": "17.15.2"
},
{
"status": "affected",
"version": "17.15.1b"
},
{
"status": "affected",
"version": "17.15.1x"
},
{
"status": "affected",
"version": "17.15.3"
},
{
"status": "affected",
"version": "17.15.2c"
},
{
"status": "affected",
"version": "17.15.2a"
},
{
"status": "affected",
"version": "17.15.1y"
},
{
"status": "affected",
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{
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{
"status": "affected",
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]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the implementation of the TACACS+ protocol in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to view sensitive data or bypass authentication. \r\n\r This vulnerability exists because the system does not properly check whether the required TACACS+ shared secret is configured. A machine-in-the-middle attacker could exploit this vulnerability by intercepting and reading unencrypted TACACS+ messages or impersonating the TACACS+ server and falsely accepting arbitrary authentication requests. A successful exploit could allow the attacker to view sensitive information in a TACACS+ message or bypass authentication and gain access to the affected device."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-287",
"description": "Improper Authentication",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-01T16:49:08.602Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-ios-tacacs-hdB7thJw",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-tacacs-hdB7thJw"
}
],
"source": {
"advisory": "cisco-sa-ios-tacacs-hdB7thJw",
"defects": [
"CSCwm99306"
],
"discovery": "INTERNAL"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2025-20160",
"datePublished": "2025-09-24T17:10:22.652Z",
"dateReserved": "2024-10-10T19:15:13.217Z",
"dateUpdated": "2025-10-01T16:49:08.602Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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Sightings
| Author | Source | Type | Date |
|---|
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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