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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-53521",
"assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
"state": "PUBLISHED",
"assignerShortName": "f5",
"dateReserved": "2025-10-03T23:04:38.083Z",
"datePublished": "2025-10-15T13:55:52.694Z",
"dateUpdated": "2026-03-31T16:04:27.360Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
"shortName": "f5",
"dateUpdated": "2026-03-31T16:04:27.360Z"
},
"title": "BigIP APM Vulnerability",
"datePublic": "2025-10-15T14:00:00.000Z",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-121",
"description": "CWE-121 Stack-based Buffer Overflow",
"type": "CWE"
}
]
}
],
"affected": [
{
"vendor": "F5",
"product": "BIG-IP",
"modules": [
"APM"
],
"versions": [
{
"status": "affected",
"version": "17.5.0",
"lessThan": "17.5.1.3",
"versionType": "custom"
},
{
"status": "affected",
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"lessThan": "17.1.3",
"versionType": "custom"
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"status": "affected",
"version": "16.1.0",
"lessThan": "16.1.6.1",
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{
"status": "affected",
"version": "15.1.0",
"lessThan": "15.1.10.8",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
],
"descriptions": [
{
"lang": "en",
"value": "When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE).  \n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
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"value": "<span style=\"background-color: rgb(255, 255, 255);\"><span style=\"background-color: rgb(255, 255, 255);\">When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE).</span>&nbsp;&nbsp;\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.\n\n</span>"
}
]
}
],
"references": [
{
"url": "https://my.f5.com/manage/s/article/K000156741",
"tags": [
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]
}
],
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"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH",
"baseSeverity": "CRITICAL",
"baseScore": 9.8,
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"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subAvailabilityImpact": "NONE",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"baseSeverity": "CRITICAL",
"baseScore": 9.3,
"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"
}
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],
"credits": [
{
"lang": "en",
"value": "F5 would like to thank Kristian Vlaardingerbroek, Hugo Trippaers, and other people of Schuberg Philis; Bart Vrancken; Fox-IT; and the National Cyber Security Centre (NCSC) in the Netherlands for their assistance in investigating this issue and following the highest standards of coordinated disclosure.",
"type": "finder"
}
],
"source": {
"discovery": "INTERNAL"
},
"x_generator": {
"engine": "F5 SIRTBot v1.0"
}
},
"adp": [
{
"references": [
{
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53521",
"tags": [
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"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-03-28T03:55:47.100165Z",
"id": "CVE-2025-53521",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
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}
},
{
"other": {
"type": "kev",
"content": {
"dateAdded": "2026-03-27",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53521"
}
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}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"dateUpdated": "2026-03-29T13:56:45.917Z"
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}