Exploitation evidence
Known exploited · CISA KEV listed
Added 2025-09-02. 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: 2025-09-23. 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
Facebook / WhatsApp Desktop for Mac
Default status: unaffected
- affected: 2.22.25.2 to < 2.25.21.78 (semver)
Facebook / WhatsApp Business for iOS
Default status: unaffected
- affected: 2.22.25.2 to < 2.25.21.78 (semver)
Facebook / WhatsApp for iOS
Default status: unaffected
- affected: 2.22.25.2 to < 2.25.21.73 (semver)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
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": 0.13513,
"percentile": 0.965
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.13513,
"percentile": 0.96479
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.13513,
"percentile": 0.96475
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.13513,
"percentile": 0.96474
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.13513,
"percentile": 0.96472
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.13513,
"percentile": 0.96467
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.13513,
"percentile": 0.96464
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.13513,
"percentile": 0.96461
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.13513,
"percentile": 0.96454
}03 Nov 2026, 18:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-55177",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-08-30T03:55:35.684164Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2025-09-02",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55177"
},
"type": "kev"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-863",
"description": "CWE-863 Incorrect Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-07T17:57:35.015Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55177"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "WhatsApp Desktop for Mac",
"vendor": "Facebook",
"versions": [
{
"lessThan": "2.25.21.78",
"status": "affected",
"version": "2.22.25.2",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"product": "WhatsApp Business for iOS",
"vendor": "Facebook",
"versions": [
{
"lessThan": "2.25.21.78",
"status": "affected",
"version": "2.22.25.2",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"product": "WhatsApp for iOS",
"vendor": "Facebook",
"versions": [
{
"lessThan": "2.25.21.73",
"status": "affected",
"version": "2.22.25.2",
"versionType": "semver"
}
]
}
],
"dateAssigned": "2025-08-12T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Incomplete authorization of linked device synchronization messages in WhatsApp for iOS prior to v2.25.21.73, WhatsApp Business for iOS v2.25.21.78, and WhatsApp for Mac v2.25.21.78 could have allowed an unrelated user to trigger processing of content from an arbitrary URL on a target’s device. We assess that this vulnerability, in combination with an OS-level vulnerability on Apple platforms (CVE-2025-43300), may have been exploited in a sophisticated attack against specific targeted users."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Incorrect Authorization (CWE-863)",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-08-30T16:54:33.495Z",
"orgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827",
"shortName": "facebook"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://www.facebook.com/security/advisories/cve-2025-55177"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://www.whatsapp.com/security/advisories/2025/"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827",
"assignerShortName": "facebook",
"cveId": "CVE-2025-55177",
"datePublished": "2025-08-29T15:50:28.578Z",
"dateReserved": "2025-08-08T18:21:47.118Z",
"dateUpdated": "2026-10-07T17:57:35.015Z",
"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": 0.13513,
"percentile": 0.96449
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2025-55177",
"cwes": [
"CWE-863"
],
"dateAdded": "2025-09-02",
"dueDate": "2025-09-23",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://www.whatsapp.com/security/advisories/2025/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-55177",
"product": "WhatsApp",
"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": "Meta Platforms WhatsApp contains an incorrect authorization vulnerability due to an incomplete authorization of linked device synchronization messages. This vulnerability could allow an unrelated user to trigger processing of content from an arbitrary URL on a target’s device.",
"vendorProject": "Meta Platforms",
"vulnerabilityName": "Meta Platforms WhatsApp Incorrect Authorization Vulnerability"
}