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2 vulnerabilities found for SIMATIC ET 200clean, CM 8x IO-Link by Siemens
CVE-2025-40820 (GCVE-0-2025-40820)
Vulnerability from nvd – Published: 2025-12-09 10:44 – Updated: 2025-12-09 15:55
VLAI
Summary
Affected products do not properly enforce TCP sequence number validation in specific scenarios but accept values within a broad range. This could allow an unauthenticated remote attacker e.g. to interfere with connection setup, potentially leading to a denial of service. The attack succeeds only if an attacker can inject IP packets with spoofed addresses at precisely timed moments, and it affects only TCP-based services.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
1 reference
Impacted products
145 products
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{
"defaultStatus": "unknown",
"product": "SIMATIC ET 200MP IM 155-5 PN HF",
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{
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{
"defaultStatus": "unknown",
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{
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{
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{
"defaultStatus": "unknown",
"product": "SIMATIC Power Line Booster PLB, Base Module",
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{
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{
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{
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{
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{
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"datePublished": "2025-12-09T10:44:30.977Z",
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CVE-2025-40820 (GCVE-0-2025-40820)
Vulnerability from cvelistv5 – Published: 2025-12-09 10:44 – Updated: 2025-12-09 15:55
VLAI
Summary
Affected products do not properly enforce TCP sequence number validation in specific scenarios but accept values within a broad range. This could allow an unauthenticated remote attacker e.g. to interfere with connection setup, potentially leading to a denial of service. The attack succeeds only if an attacker can inject IP packets with spoofed addresses at precisely timed moments, and it affects only TCP-based services.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
1 reference
Impacted products
145 products
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
"defaultStatus": "unknown",
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{
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{
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{
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{
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{
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{
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{
"defaultStatus": "unknown",
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{
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},
{
"defaultStatus": "unknown",
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]
},
{
"defaultStatus": "unknown",
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]
},
{
"defaultStatus": "unknown",
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},
{
"defaultStatus": "unknown",
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},
{
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]
}
],
"descriptions": [
{
"lang": "en",
"value": "Affected products do not properly enforce TCP sequence number validation in specific scenarios but accept values within a broad range. This could allow an unauthenticated remote attacker e.g. to interfere with connection setup, potentially leading to a denial of service. The attack succeeds only if an attacker can inject IP packets with spoofed addresses at precisely timed moments, and it affects only TCP-based services."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"cvssV4_0": {
"baseScore": 8.7,
"baseSeverity": "HIGH",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-940",
"description": "CWE-940: Improper Verification of Source of a Communication Channel",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-12-09T10:44:30.977Z",
"orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
"shortName": "siemens"
},
"references": [
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-915282.html"
}
]
}
},
"cveMetadata": {
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"assignerShortName": "siemens",
"cveId": "CVE-2025-40820",
"datePublished": "2025-12-09T10:44:30.977Z",
"dateReserved": "2025-04-16T08:50:26.975Z",
"dateUpdated": "2025-12-09T15:55:23.400Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}