CVE-2025-53476 (GCVE-0-2025-53476)
Vulnerability from cvelistv5 – Published: 2025-10-07 13:49 – Updated: 2025-11-03 17:44
VLAI
EPSS
VEX
Summary
A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. A specially crafted series of network connections can lead to the server not processing subsequent Modbus requests. An attacker can open a series of TCP connections to trigger this vulnerability.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-07 14:33 UTC
CWE
- CWE-775 - Missing Release of File Descriptor or Handle after Effective Lifetime
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| OpenPLC | OpenPLC_v3 |
Affected:
a931181e8b81e36fadf7b74d5cba99b73c3f6d58
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-53476",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-07T14:33:42.008541Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-10-07T15:28:56.205Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-11-03T17:44:59.045Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2223"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "OpenPLC_v3",
"vendor": "OpenPLC",
"versions": [
{
"status": "affected",
"version": "a931181e8b81e36fadf7b74d5cba99b73c3f6d58"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Discovered by a member of Cisco Talos."
}
],
"descriptions": [
{
"lang": "en",
"value": "A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. A specially crafted series of network connections can lead to the server not processing subsequent Modbus requests. An attacker can open a series of TCP connections to trigger this vulnerability."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-775",
"description": "CWE-775: Missing Release of File Descriptor or Handle after Effective Lifetime",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-07T13:49:56.656Z",
"orgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
"shortName": "talos"
},
"references": [
{
"name": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2223",
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2223"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
"assignerShortName": "talos",
"cveId": "CVE-2025-53476",
"datePublished": "2025-10-07T13:49:56.656Z",
"dateReserved": "2025-07-11T21:16:14.229Z",
"dateUpdated": "2025-11-03T17:44:59.045Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-53476",
"date": "2026-09-16",
"epss": "0.00461",
"percentile": "0.38985"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2025-53476\",\"sourceIdentifier\":\"talos-cna@cisco.com\",\"published\":\"2025-10-07T14:15:37.270\",\"lastModified\":\"2026-06-17T09:38:16.663\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. A specially crafted series of network connections can lead to the server not processing subsequent Modbus requests. An attacker can open a series of TCP connections to trigger this vulnerability.\"}],\"affected\":[{\"source\":\"talos-cna@cisco.com\",\"affectedData\":[{\"vendor\":\"OpenPLC\",\"product\":\"OpenPLC_v3\",\"versions\":[{\"version\":\"a931181e8b81e36fadf7b74d5cba99b73c3f6d58\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"talos-cna@cisco.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-10-07T14:33:42.008541Z\",\"id\":\"CVE-2025-53476\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"talos-cna@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-775\"}]}],\"references\":[{\"url\":\"https://talosintelligence.com/vulnerability_reports/TALOS-2025-2223\",\"source\":\"talos-cna@cisco.com\"},{\"url\":\"https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2223\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
"redhat_vex": {
"current_release_date": "2025-10-08T20:19:24+00:00",
"cve": "CVE-2025-53476",
"id": "CVE-2025-53476",
"initial_release_date": "2025-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "CVE-2025-53476",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-53476.json",
"version": "3"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2223\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T17:44:59.045Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-53476\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-07T14:33:42.008541Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-07T14:33:45.637Z\"}}], \"cna\": {\"credits\": [{\"lang\": \"en\", \"value\": \"Discovered by a member of Cisco Talos.\"}], \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"OpenPLC\", \"product\": \"OpenPLC_v3\", \"versions\": [{\"status\": \"affected\", \"version\": \"a931181e8b81e36fadf7b74d5cba99b73c3f6d58\"}]}], \"references\": [{\"url\": \"https://talosintelligence.com/vulnerability_reports/TALOS-2025-2223\", \"name\": \"https://talosintelligence.com/vulnerability_reports/TALOS-2025-2223\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. A specially crafted series of network connections can lead to the server not processing subsequent Modbus requests. An attacker can open a series of TCP connections to trigger this vulnerability.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-775\", \"description\": \"CWE-775: Missing Release of File Descriptor or Handle after Effective Lifetime\"}]}], \"providerMetadata\": {\"orgId\": \"b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b\", \"shortName\": \"talos\", \"dateUpdated\": \"2025-10-07T13:49:56.656Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-53476\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T17:44:59.045Z\", \"dateReserved\": \"2025-07-11T21:16:14.229Z\", \"assignerOrgId\": \"b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b\", \"datePublished\": \"2025-10-07T13:49:56.656Z\", \"assignerShortName\": \"talos\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…