cve-2025-20340
Vulnerability from cvelistv5
Published
2025-09-10 16:06
Modified
2025-09-10 18:31
Severity ?
EPSS score ?
Summary
Cisco IOS XR Address Resolution Protocol Broadcast Storm Vulnerability
References
Impacted products
| ▼ | Vendor | Product |
|---|---|---|
| Cisco | Cisco IOS XR Software |
{
"containers": {
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"metrics": [
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"other": {
"content": {
"id": "CVE-2025-20340",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-10T18:30:55.478853Z",
"version": "2.0.3"
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"type": "ssvc"
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"providerMetadata": {
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"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Cisco IOS XR Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "6.5.3"
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{
"status": "affected",
"version": "6.5.29"
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{
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"version": "6.5.1"
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{
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{
"status": "affected",
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{
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{
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{
"status": "affected",
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{
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{
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{
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{
"status": "affected",
"version": "6.5.93"
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{
"status": "affected",
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{
"status": "affected",
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"status": "affected",
"version": "7.1.3"
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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",
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{
"status": "affected",
"version": "6.8.1"
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"status": "affected",
"version": "7.4.15"
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{
"status": "affected",
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{
"status": "affected",
"version": "7.3.2"
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{
"status": "affected",
"version": "7.5.1"
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{
"status": "affected",
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{
"status": "affected",
"version": "7.3.27"
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{
"status": "affected",
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"status": "affected",
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"status": "affected",
"version": "6.8.2"
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"status": "affected",
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"status": "affected",
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{
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{
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"version": "7.5.3"
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{
"status": "affected",
"version": "7.7.2"
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{
"status": "affected",
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{
"status": "affected",
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{
"status": "affected",
"version": "7.10.1"
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"status": "affected",
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{
"status": "affected",
"version": "7.5.4"
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{
"status": "affected",
"version": "6.5.33"
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{
"status": "affected",
"version": "7.8.22"
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{
"status": "affected",
"version": "7.7.21"
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{
"status": "affected",
"version": "7.9.2"
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{
"status": "affected",
"version": "7.3.5"
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{
"status": "affected",
"version": "7.5.5"
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{
"status": "affected",
"version": "7.11.1"
},
{
"status": "affected",
"version": "7.9.21"
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{
"status": "affected",
"version": "7.10.2"
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{
"status": "affected",
"version": "24.1.1"
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{
"status": "affected",
"version": "7.6.3"
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{
"status": "affected",
"version": "7.3.6"
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{
"status": "affected",
"version": "7.5.52"
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{
"status": "affected",
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"status": "affected",
"version": "24.2.1"
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{
"status": "affected",
"version": "24.1.2"
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{
"status": "affected",
"version": "24.2.11"
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"status": "affected",
"version": "24.3.1"
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"status": "affected",
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{
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"version": "24.2.2"
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{
"status": "affected",
"version": "7.8.23"
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{
"status": "affected",
"version": "7.11.21"
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"version": "24.2.20"
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{
"status": "affected",
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{
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{
"status": "affected",
"version": "25.1.1"
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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": "6.5.351"
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"status": "affected",
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"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the Address Resolution Protocol (ARP) implementation of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to trigger a broadcast storm, leading to a denial of service (DoS) condition on an affected device.\u0026nbsp;\r\n\r\nThis vulnerability is due to how Cisco IOS XR Software processes a high, sustained rate of ARP traffic hitting the management interface. Under certain conditions, an attacker could exploit this vulnerability by sending an excessive amount of traffic to the management interface of an affected device, overwhelming its ARP processing capabilities. A successful exploit could result in degraded device performance, loss of management connectivity, and complete unresponsiveness of the system, leading to a DoS condition."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "Uncontrolled Resource Consumption",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-10T16:06:58.467Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-iosxr-arp-storm-EjUU55yM",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-arp-storm-EjUU55yM"
}
],
"source": {
"advisory": "cisco-sa-iosxr-arp-storm-EjUU55yM",
"defects": [
"CSCwm86399"
],
"discovery": "EXTERNAL"
},
"title": "Cisco IOS XR Address Resolution Protocol Broadcast Storm Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2025-20340",
"datePublished": "2025-09-10T16:06:58.467Z",
"dateReserved": "2024-10-10T19:15:13.255Z",
"dateUpdated": "2025-09-10T18:31:00.589Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-20340\",\"sourceIdentifier\":\"psirt@cisco.com\",\"published\":\"2025-09-10T16:15:36.340\",\"lastModified\":\"2025-09-11T17:14:10.147\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the Address Resolution Protocol (ARP) implementation of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to trigger a broadcast storm, leading to a denial of service (DoS) condition on an affected device.\u0026nbsp;\\r\\n\\r\\nThis vulnerability is due to how Cisco IOS XR Software processes a high, sustained rate of ARP traffic hitting the management interface. Under certain conditions, an attacker could exploit this vulnerability by sending an excessive amount of traffic to the management interface of an affected device, overwhelming its ARP processing capabilities. A successful exploit could result in degraded device performance, loss of management connectivity, and complete unresponsiveness of the system, leading to a DoS condition.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"baseScore\":7.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":4.0}]},\"weaknesses\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"}]}],\"references\":[{\"url\":\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-arp-storm-EjUU55yM\",\"source\":\"psirt@cisco.com\"}]}}"
}
}
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- 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.