CVE-2026-8247 (GCVE-0-2026-8247)
Vulnerability from cvelistv5
Published
2026-07-02 23:07
Modified
2026-08-27 22:58
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the same local network segment to execute arbitrary code.
This vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2.
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WatchGuard | Fireware OS |
Version: 2025.1 < 2026.2.1 Version: 12.0 < 12.12.1 Version: 11.0 < * |
||||||||||||
|
||||||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-8247",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-06T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-07T03:56:33.916Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"Default"
],
"product": "Fireware OS",
"vendor": "WatchGuard",
"versions": [
{
"lessThan": "2026.2.1",
"status": "affected",
"version": "2025.1",
"versionType": "custom"
},
{
"lessThan": "12.12.1",
"status": "affected",
"version": "12.0",
"versionType": "custom"
},
{
"lessThan": "*",
"status": "affected",
"version": "11.0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"platforms": [
"EUCC"
],
"product": "Fireware OS",
"vendor": "WatchGuard",
"versions": [
{
"lessThan": "12.11.9",
"status": "affected",
"version": "12.0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"platforms": [
"T15/T35"
],
"product": "Fireware OS",
"vendor": "WatchGuard",
"versions": [
{
"lessThan": "12.5.19",
"status": "affected",
"version": "12.0",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*",
"versionEndExcluding": "12.11.9",
"versionStartIncluding": "12.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*",
"versionEndExcluding": "12.5.19",
"versionStartIncluding": "12.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2026.2.1",
"versionStartIncluding": "2025.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*",
"versionEndExcluding": "12.12.1",
"versionStartIncluding": "12.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*",
"versionStartIncluding": "11.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "OR"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Xander Mackenzie | @thetrueartist working with TrendAI Zero Day Initiative"
}
],
"datePublic": "2026-07-02T23:07:16.148Z",
"descriptions": [
{
"lang": "en",
"value": "An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the same local network segment to execute arbitrary code.\n\n\n\n\nThis vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2."
}
],
"exploits": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "WatchGuard is not aware of any exploitation of this vulnerability in the wild."
}
],
"value": "WatchGuard is not aware of any exploitation of this vulnerability in the wild."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 7.7,
"baseSeverity": "HIGH",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-120",
"description": "CWE-120",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T22:58:26.584Z",
"orgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3",
"shortName": "WatchGuard"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://psirt.watchguard.com/CVE-2026-8247"
},
{
"tags": [
"vendor-advisory"
],
"url": "https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00026"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.5.19, Fireware OS 12.11.9"
}
],
"value": "Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.5.19, Fireware OS 12.11.9"
}
],
"title": "WatchGuard Firebox admd Out of Bounds Write Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3",
"assignerShortName": "WatchGuard",
"cveId": "CVE-2026-8247",
"datePublished": "2026-07-02T23:07:16.148Z",
"dateReserved": "2026-05-10T12:48:43.918Z",
"dateUpdated": "2026-08-27T22:58:26.584Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-8247\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-06T15:46:50.741660Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-06T15:46:54.782Z\"}}], \"cna\": {\"title\": \"WatchGuard Firebox admd Out of Bounds Write Vulnerability\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Xander Mackenzie | @thetrueartist working with TrendAI Zero Day Initiative\"}], \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 7.7, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N\"}}], \"affected\": [{\"vendor\": \"WatchGuard\", \"product\": \"Fireware OS\", \"versions\": [{\"status\": \"affected\", \"version\": \"2025.1\", \"lessThan\": \"2026.2.1\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"12.0\", \"lessThan\": \"12.12.1\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"11.0\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"platforms\": [\"Default\"], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"WatchGuard\", \"product\": \"Fireware OS\", \"versions\": [{\"status\": \"affected\", \"version\": \"12.0\", \"lessThan\": \"12.11.9\", \"versionType\": \"custom\"}], \"platforms\": [\"EUCC\"], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"WatchGuard\", \"product\": \"Fireware OS\", \"versions\": [{\"status\": \"affected\", \"version\": \"12.0\", \"lessThan\": \"12.5.19\", \"versionType\": \"custom\"}], \"platforms\": [\"T15/T35\"], \"defaultStatus\": \"unaffected\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"WatchGuard is not aware of any exploitation of this vulnerability in the wild.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"WatchGuard is not aware of any exploitation of this vulnerability in the wild.\", \"base64\": false}]}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.5.19, Fireware OS 12.11.9\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.5.19, Fireware OS 12.11.9\", \"base64\": false}]}], \"datePublic\": \"2026-07-02T23:07:16.148Z\", \"references\": [{\"url\": \"https://psirt.watchguard.com/CVE-2026-8247\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00026\", \"tags\": [\"vendor-advisory\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the same local network segment to execute arbitrary code.\\n\\n\\n\\n\\nThis vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-120\", \"description\": \"CWE-120\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"12.11.9\", \"versionStartIncluding\": \"12.0\"}, {\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"12.5.19\", \"versionStartIncluding\": \"12.0\"}, {\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2026.2.1\", \"versionStartIncluding\": \"2025.1\"}, {\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"12.12.1\", \"versionStartIncluding\": \"12.0\"}, {\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"11.0\"}], \"operator\": \"OR\"}], \"operator\": \"OR\"}], \"providerMetadata\": {\"orgId\": \"5d1c2695-1a31-4499-88ae-e847036fd7e3\", \"shortName\": \"WatchGuard\", \"dateUpdated\": \"2026-08-27T22:58:26.584Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-8247\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-27T22:58:26.584Z\", \"dateReserved\": \"2026-05-10T12:48:43.918Z\", \"assignerOrgId\": \"5d1c2695-1a31-4499-88ae-e847036fd7e3\", \"datePublished\": \"2026-07-02T23:07:16.148Z\", \"assignerShortName\": \"WatchGuard\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…