Exploitation evidence
Known exploited · CISA KEV listed
Added 2025-11-12. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date: 2025-12-03. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
WatchGuard / Fireware OS
Default status: unaffected
- affected: 11.0 to ≤ 11.12.4+541730 (custom)
- affected: 12.0 to < 12.11.4 (custom)
- affected: 2025.0 to < 2025.1.1 (custom)
WatchGuard / Fireware OS
Default status: unaffected
- affected: 12.0 to < 12.3.1+722811 (custom)
WatchGuard / Fireware OS
Default status: unaffected
- affected: 12.0 to < 12.5.13 (custom)
Fixes and workarounds
Fireware OS 2025.1.1, Fireware OS 12.11.4, Fireware OS 12.5.13, Fireware OS 12.3.1+722811
Reported workarounds: If your Firebox is only configured with Branch Office VPN tunnels to static gateway peers and you are not able to immediately upgrade the device to a version of Fireware OS with the vulnerability resolution, you can follow WatchGuard’s recommendations for Secure Access to Branch Office VPNs that Use IPSec and IKEv2 as a temporary workaround.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- https://psirt.watchguard.com/CVE-2025-9242
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015
- https://github.com/watchtowrlabs/watchTowr-vs-WatchGuard-CVE-2025-9242/blob/main/watchTowr-vs-WatchGuard-CVE-2025-9242.py
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-9242
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.92219,
"percentile": 0.99825
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.92219,
"percentile": 0.99823
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.92219,
"percentile": 0.99823
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.92219,
"percentile": 0.99823
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.92219,
"percentile": 0.99823
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.92219,
"percentile": 0.99823
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.92219,
"percentile": 0.99823
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.92219,
"percentile": 0.99823
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.92219,
"percentile": 0.99822
}03 Nov 2026, 12:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-9242",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-11-11T04:55:33.935049Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2025-11-12",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-9242"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-26T17:48:28.750Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/watchtowrlabs/watchTowr-vs-WatchGuard-CVE-2025-9242/blob/main/watchTowr-vs-WatchGuard-CVE-2025-9242.py"
},
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-9242"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-11-12T00:00:00.000Z",
"value": "CVE-2025-9242 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"Default"
],
"product": "Fireware OS",
"vendor": "WatchGuard",
"versions": [
{
"lessThanOrEqual": "11.12.4+541730",
"status": "affected",
"version": "11.0",
"versionType": "custom"
},
{
"lessThan": "12.11.4",
"status": "affected",
"version": "12.0",
"versionType": "custom"
},
{
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"status": "affected",
"version": "2025.0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"platforms": [
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],
"product": "Fireware OS",
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]
},
{
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"platforms": [
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],
"product": "Fireware OS",
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{
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"status": "affected",
"version": "12.0",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*",
"versionEndExcluding": "12.3.1+722811",
"versionStartIncluding": "12.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*",
"versionEndExcluding": "12.5.13",
"versionStartIncluding": "12.0",
"vulnerable": true
},
{
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"versionStartIncluding": "11.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*",
"versionEndExcluding": "12.11.4",
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},
{
"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2025.1.1",
"versionStartIncluding": "2025.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "OR"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "btaol"
}
],
"datePublic": "2025-09-17T07:29:23.738Z",
"descriptions": [
{
"lang": "en",
"value": "An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked process may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer.\nIf the Firebox was previously configured with the mobile user VPN with IKEv2 or a branch office VPN using IKEv2 to a dynamic gateway peer, and both of those configurations have since been deleted, that Firebox may still be vulnerable if a branch office VPN to a static gateway peer is still configured."
}
],
"exploits": [
{
"lang": "en",
"value": "We have evidence that suggests this vulnerability is under active exploitation.\n\nIndicators of Attack\n\nWe are providing the following Indicators of Attack (IoAs) to help device owners identify potential attempts to exploit this vulnerability against vulnerable Firebox appliances. These IoAs are only applicable on devices that lack the resolution described later in this advisory.\n\nAbnormally large IKE_AUTH request IDi payload\n\nWith iked diagnostic logging set to the Info logging level, the iked process generates a log message when the Firebox receives an IKE_AUTH request message. An IKE_AUTH request log message with an abnormally large IDi payload size (greater than 100 bytes) is a strong indicator of an attack.\nThe following example diagnostic log shows an example IDi payload size of 300 bytes.\n1970-01-01 01:00:00 iked (203.0.113.1<->203.0.113.2)\"IKE_AUTH request\" message has 6 payloads [ IDi(sz=300) CERT(sz=889) SA(sz=44) TSi(sz=24) TSr(sz=24) N(sz=8)]\n\nIKE Process Hang\n\nDuring a successful exploit, the IKED process (responsible for handling IKE negotiations) will hang, interrupting VPN tunnel negotiations and re-keys. This is a strong indicator of attack. Existing tunnels may continue to pass traffic.\n\nIKED Process Crash\n\nAfter a failed or successful exploit, the IKED process will crash and generate a fault report on the Firebox. Be aware, there are other situations that could cause the IKED process to crash. This is a weak indicator of attack."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-10T15:28:40.461Z",
"orgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3",
"shortName": "WatchGuard"
},
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{
"tags": [
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"url": "https://psirt.watchguard.com/CVE-2025-9242"
},
{
"tags": [
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],
"url": "https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015"
}
],
"solutions": [
{
"lang": "en",
"value": "Fireware OS 2025.1.1, Fireware OS 12.11.4, Fireware OS 12.5.13, Fireware OS 12.3.1+722811"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-10-21T00:00:00.000Z",
"value": "Updated to provide Indicators of Attack and additional remediation guidance due to potential active exploits in the wild."
},
{
"lang": "en",
"time": "2025-11-07T00:00:00.000Z",
"value": "Updated to correct an error in the logging level required for the IDi payload size IOA."
},
{
"lang": "en",
"time": "2025-12-01T00:00:00.000Z",
"value": "Updated the IKE Process Hang Indicator of Attack with new information regarding tunnel traffic availabiltiy."
}
],
"title": "WatchGuard Firebox iked Out of Bounds Write Vulnerability",
"workarounds": [
{
"lang": "en",
"value": "If your Firebox is only configured with Branch Office VPN tunnels to static gateway peers and you are not able to immediately upgrade the device to a version of Fireware OS with the vulnerability resolution, you can follow WatchGuard’s recommendations for Secure Access to Branch Office VPNs that Use IPSec and IKEv2 as a temporary workaround."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3",
"assignerShortName": "WatchGuard",
"cveId": "CVE-2025-9242",
"datePublished": "2025-09-17T07:29:23.738Z",
"dateReserved": "2025-08-20T11:08:20.724Z",
"dateUpdated": "2026-08-10T15:28:40.461Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.92219,
"percentile": 0.99822
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2025-9242",
"cwes": [
"CWE-787"
],
"dateAdded": "2025-11-12",
"dueDate": "2025-12-03",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015 ; https://nvd.nist.gov/vuln/detail/CVE-2025-9242",
"product": "Firebox",
"requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "WatchGuard Firebox contains an out-of-bounds write vulnerability in the OS iked process that may allow a remote unauthenticated attacker to execute arbitrary code.",
"vendorProject": "WatchGuard",
"vulnerabilityName": "WatchGuard Firebox Out-of-Bounds Write Vulnerability"
}