Search
Find a vulnerability
Search criteria
ⓘ
Use this form to refine search results.
Full-text search supports keyword queries with ranking and filtering.
You can combine vendor, product, and sources to narrow results.
Enable “Apply ordering” to sort by date instead of relevance.
4 vulnerabilities by lwIP
CVE-2026-91018 (GCVE-0-2026-91018)
Vulnerability from nvd – Published: 2026-09-22 20:25 – Updated: 2026-09-23 13:05
VLAI
EPSS
VEX
Title
Double Free in lwIP (lightweight IP)
Summary
lwIP (Lightweight IP) has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 13:03 UTC
CWE
- CWE-415 - Double free
Assigner
References
Date Public
2026-09-22 17:53
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-91018",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-23T13:03:21.536853Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-23T13:05:15.963Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "lwIP API",
"vendor": "lwIP",
"versions": [
{
"lessThanOrEqual": "2.2.1",
"status": "affected",
"version": "2.0.1",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Eric Evenchick of Tetrel Security reported this vulnerability to CISA."
}
],
"datePublic": "2026-09-22T17:53:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "lwIP (Lightweight IP)\u0026nbsp;has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system."
}
],
"value": "lwIP (Lightweight IP)\u00a0has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "ADJACENT",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-415",
"description": "CWE-415 Double free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-22T20:25:33.530Z",
"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"shortName": "icscert"
},
"references": [
{
"url": "https://cgit.git.savannah.gnu.org/cgit/lwip.git"
},
{
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-02"
},
{
"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-02.json"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Users of lwIP are encouraged to update their version of lwIP using the repository found at\u0026nbsp;\u003ca href=\"https://cgit.git.savannah.gnu.org/cgit/lwip.git\"\u003ehttps://cgit.git.savannah.gnu.org/cgit/lwip.git\u003c/a\u003e. The commit identifier that contains the fix is f873b6295933e4149a2132adf3e9a2d2a676a5ec."
}
],
"value": "Users of lwIP are encouraged to update their version of lwIP using the repository found at\u00a0 https://cgit.git.savannah.gnu.org/cgit/lwip.git . The commit identifier that contains the fix is f873b6295933e4149a2132adf3e9a2d2a676a5ec."
}
],
"source": {
"advisory": "ICSA-26-265-02",
"discovery": "EXTERNAL"
},
"title": "Double Free in lwIP (lightweight IP)",
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"assignerShortName": "icscert",
"cveId": "CVE-2026-91018",
"datePublished": "2026-09-22T20:25:33.530Z",
"dateReserved": "2026-09-14T16:40:45.500Z",
"dateUpdated": "2026-09-23T13:05:15.963Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-87121 (GCVE-0-2026-87121)
Vulnerability from nvd – Published: 2026-09-22 19:48 – Updated: 2026-09-22 20:23
VLAI
EPSS
VEX
Title
Out-of-bounds write in lwIP TCP/IP Stack MQTT Client Application
Summary
lwIP TCP/IP Stack MQTT is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 20:23 UTC
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| lwIP | TCP/IP Stack MQTT |
Affected:
2.0.1 , ≤ 2.2.1
(custom)
|
Date Public
2026-09-22 17:53
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-87121",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-22T20:23:00.531481Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-22T20:23:09.069Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "TCP/IP Stack MQTT",
"vendor": "lwIP",
"versions": [
{
"lessThanOrEqual": "2.2.1",
"status": "affected",
"version": "2.0.1",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Shahriyar Jalayeri of ByteRay Ltd. reported this vulnerability to CISA."
}
],
"datePublic": "2026-09-22T17:53:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "lwIP\u0026nbsp;TCP/IP Stack MQTT\u0026nbsp;is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device."
}
],
"value": "lwIP\u00a0TCP/IP Stack MQTT\u00a0is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-22T19:51:50.077Z",
"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"shortName": "icscert"
},
"references": [
{
"url": "https://savannah.nongnu.org/projects/lwip"
},
{
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-01"
},
{
"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-01.json"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Users of lwIP are encouraged to update their version of lwIP using the repository found at\u0026nbsp;\u003ca href=\"https://savannah.nongnu.org/projects/lwip\"\u003ehttps://savannah.nongnu.org/projects/lwip\u003c/a\u003e. The commit identifier that contains the fix is f89407ea711879c04d91c92b35d67be78bbaf0f1."
}
],
"value": "Users of lwIP are encouraged to update their version of lwIP using the repository found at\u00a0 https://savannah.nongnu.org/projects/lwip . The commit identifier that contains the fix is f89407ea711879c04d91c92b35d67be78bbaf0f1."
}
],
"source": {
"advisory": "ICSA-26-265-01",
"discovery": "EXTERNAL"
},
"title": "Out-of-bounds write in lwIP TCP/IP Stack MQTT Client Application",
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"assignerShortName": "icscert",
"cveId": "CVE-2026-87121",
"datePublished": "2026-09-22T19:48:25.046Z",
"dateReserved": "2026-09-09T21:28:27.099Z",
"dateUpdated": "2026-09-22T20:23:09.069Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-91018 (GCVE-0-2026-91018)
Vulnerability from cvelistv5 – Published: 2026-09-22 20:25 – Updated: 2026-09-23 13:05
VLAI
EPSS
VEX
Title
Double Free in lwIP (lightweight IP)
Summary
lwIP (Lightweight IP) has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 13:03 UTC
CWE
- CWE-415 - Double free
Assigner
References
Date Public
2026-09-22 17:53
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-91018",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-23T13:03:21.536853Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-23T13:05:15.963Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "lwIP API",
"vendor": "lwIP",
"versions": [
{
"lessThanOrEqual": "2.2.1",
"status": "affected",
"version": "2.0.1",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Eric Evenchick of Tetrel Security reported this vulnerability to CISA."
}
],
"datePublic": "2026-09-22T17:53:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "lwIP (Lightweight IP)\u0026nbsp;has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system."
}
],
"value": "lwIP (Lightweight IP)\u00a0has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "ADJACENT",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-415",
"description": "CWE-415 Double free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-22T20:25:33.530Z",
"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"shortName": "icscert"
},
"references": [
{
"url": "https://cgit.git.savannah.gnu.org/cgit/lwip.git"
},
{
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-02"
},
{
"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-02.json"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Users of lwIP are encouraged to update their version of lwIP using the repository found at\u0026nbsp;\u003ca href=\"https://cgit.git.savannah.gnu.org/cgit/lwip.git\"\u003ehttps://cgit.git.savannah.gnu.org/cgit/lwip.git\u003c/a\u003e. The commit identifier that contains the fix is f873b6295933e4149a2132adf3e9a2d2a676a5ec."
}
],
"value": "Users of lwIP are encouraged to update their version of lwIP using the repository found at\u00a0 https://cgit.git.savannah.gnu.org/cgit/lwip.git . The commit identifier that contains the fix is f873b6295933e4149a2132adf3e9a2d2a676a5ec."
}
],
"source": {
"advisory": "ICSA-26-265-02",
"discovery": "EXTERNAL"
},
"title": "Double Free in lwIP (lightweight IP)",
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"assignerShortName": "icscert",
"cveId": "CVE-2026-91018",
"datePublished": "2026-09-22T20:25:33.530Z",
"dateReserved": "2026-09-14T16:40:45.500Z",
"dateUpdated": "2026-09-23T13:05:15.963Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-87121 (GCVE-0-2026-87121)
Vulnerability from cvelistv5 – Published: 2026-09-22 19:48 – Updated: 2026-09-22 20:23
VLAI
EPSS
VEX
Title
Out-of-bounds write in lwIP TCP/IP Stack MQTT Client Application
Summary
lwIP TCP/IP Stack MQTT is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 20:23 UTC
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| lwIP | TCP/IP Stack MQTT |
Affected:
2.0.1 , ≤ 2.2.1
(custom)
|
Date Public
2026-09-22 17:53
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-87121",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-22T20:23:00.531481Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-22T20:23:09.069Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "TCP/IP Stack MQTT",
"vendor": "lwIP",
"versions": [
{
"lessThanOrEqual": "2.2.1",
"status": "affected",
"version": "2.0.1",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Shahriyar Jalayeri of ByteRay Ltd. reported this vulnerability to CISA."
}
],
"datePublic": "2026-09-22T17:53:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "lwIP\u0026nbsp;TCP/IP Stack MQTT\u0026nbsp;is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device."
}
],
"value": "lwIP\u00a0TCP/IP Stack MQTT\u00a0is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-22T19:51:50.077Z",
"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"shortName": "icscert"
},
"references": [
{
"url": "https://savannah.nongnu.org/projects/lwip"
},
{
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-01"
},
{
"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-01.json"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Users of lwIP are encouraged to update their version of lwIP using the repository found at\u0026nbsp;\u003ca href=\"https://savannah.nongnu.org/projects/lwip\"\u003ehttps://savannah.nongnu.org/projects/lwip\u003c/a\u003e. The commit identifier that contains the fix is f89407ea711879c04d91c92b35d67be78bbaf0f1."
}
],
"value": "Users of lwIP are encouraged to update their version of lwIP using the repository found at\u00a0 https://savannah.nongnu.org/projects/lwip . The commit identifier that contains the fix is f89407ea711879c04d91c92b35d67be78bbaf0f1."
}
],
"source": {
"advisory": "ICSA-26-265-01",
"discovery": "EXTERNAL"
},
"title": "Out-of-bounds write in lwIP TCP/IP Stack MQTT Client Application",
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"assignerShortName": "icscert",
"cveId": "CVE-2026-87121",
"datePublished": "2026-09-22T19:48:25.046Z",
"dateReserved": "2026-09-09T21:28:27.099Z",
"dateUpdated": "2026-09-22T20:23:09.069Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}