CVE-2026-66767 (GCVE-0-2026-66767)
Vulnerability from cvelistv5 – Published: 2026-09-08 00:11 – Updated: 2026-09-08 00:11
VLAI
EPSS
VEX
Title
Memory Corruption vulnerability in SAP NetWeaver Application Server for ABAP and ABAP Platform
Summary
SAP NetWeaver Application Server for ABAP and ABAP Platform allows an unauthenticated user to send a specially crafted packet that triggers reprocessing of a previously buffered user request, potentially hijacking another user's session under narrow timing conditions. Successful exploitation could result in high impact on confidentiality and integrity, with low impact on availability of the application.
Severity
7.7 (High)
CWE
- CWE-191 - Integer Underflow
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| SAP_SE | SAP NetWeaver Application Server for ABAP and ABAP Platform |
Affected:
KRNL64NUC 7.22
Affected: 7.22EXT Affected: KRNL64UC 7.22 Affected: 7.53 Affected: 8.04 Affected: KERNEL 7.22 Affected: 7.54 Affected: 7.77 Affected: 7.93 Affected: 9.16 Affected: 9.18 Affected: 9.19 Affected: 9.20 |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "SAP NetWeaver Application Server for ABAP and ABAP Platform",
"vendor": "SAP_SE",
"versions": [
{
"status": "affected",
"version": "KRNL64NUC 7.22"
},
{
"status": "affected",
"version": "7.22EXT"
},
{
"status": "affected",
"version": "KRNL64UC 7.22"
},
{
"status": "affected",
"version": "7.53"
},
{
"status": "affected",
"version": "8.04"
},
{
"status": "affected",
"version": "KERNEL 7.22"
},
{
"status": "affected",
"version": "7.54"
},
{
"status": "affected",
"version": "7.77"
},
{
"status": "affected",
"version": "7.93"
},
{
"status": "affected",
"version": "9.16"
},
{
"status": "affected",
"version": "9.18"
},
{
"status": "affected",
"version": "9.19"
},
{
"status": "affected",
"version": "9.20"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eSAP NetWeaver Application Server for ABAP and ABAP Platform allows an unauthenticated user to send a specially crafted packet that triggers reprocessing of a previously buffered user request, potentially hijacking another user\u0027s session under narrow timing conditions. Successful exploitation could result in high impact on confidentiality and integrity, with low impact on availability of the application.\u003c/p\u003e"
}
],
"value": "SAP NetWeaver Application Server for ABAP and ABAP Platform allows an unauthenticated user to send a specially crafted packet that triggers reprocessing of a previously buffered user request, potentially hijacking another user\u0027s session under narrow timing conditions. Successful exploitation could result in high impact on confidentiality and integrity, with low impact on availability of the application."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-191",
"description": "CWE-191: Integer Underflow",
"lang": "eng",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-08T00:11:06.906Z",
"orgId": "e4686d1a-f260-4930-ac4c-2f5c992778dd",
"shortName": "sap"
},
"references": [
{
"url": "https://me.sap.com/notes/3757002"
},
{
"url": "https://url.sap/sapsecuritypatchday"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Memory Corruption vulnerability in SAP NetWeaver Application Server for ABAP and ABAP Platform",
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "e4686d1a-f260-4930-ac4c-2f5c992778dd",
"assignerShortName": "sap",
"cveId": "CVE-2026-66767",
"datePublished": "2026-09-08T00:11:06.906Z",
"dateReserved": "2026-07-27T17:33:40.733Z",
"dateUpdated": "2026-09-08T00:11:06.906Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-66767\",\"sourceIdentifier\":\"cna@sap.com\",\"published\":\"2026-09-08T01:17:51.987\",\"lastModified\":\"2026-09-08T01:17:51.987\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"SAP NetWeaver Application Server for ABAP and ABAP Platform allows an unauthenticated user to send a specially crafted packet that triggers reprocessing of a previously buffered user request, potentially hijacking another user\u0027s session under narrow timing conditions. Successful exploitation could result in high impact on confidentiality and integrity, with low impact on availability of the application.\"}],\"affected\":[{\"source\":\"cna@sap.com\",\"affectedData\":[{\"vendor\":\"SAP_SE\",\"product\":\"SAP NetWeaver Application Server for ABAP and ABAP Platform\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"KRNL64NUC 7.22\",\"status\":\"affected\"},{\"version\":\"7.22EXT\",\"status\":\"affected\"},{\"version\":\"KRNL64UC 7.22\",\"status\":\"affected\"},{\"version\":\"7.53\",\"status\":\"affected\"},{\"version\":\"8.04\",\"status\":\"affected\"},{\"version\":\"KERNEL 7.22\",\"status\":\"affected\"},{\"version\":\"7.54\",\"status\":\"affected\"},{\"version\":\"7.77\",\"status\":\"affected\"},{\"version\":\"7.93\",\"status\":\"affected\"},{\"version\":\"9.16\",\"status\":\"affected\"},{\"version\":\"9.18\",\"status\":\"affected\"},{\"version\":\"9.19\",\"status\":\"affected\"},{\"version\":\"9.20\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cna@sap.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L\",\"baseScore\":7.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.2,\"impactScore\":5.5}]},\"weaknesses\":[{\"source\":\"cna@sap.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-191\"}]}],\"references\":[{\"url\":\"https://me.sap.com/notes/3757002\",\"source\":\"cna@sap.com\"},{\"url\":\"https://url.sap/sapsecuritypatchday\",\"source\":\"cna@sap.com\"}]}}"
}
}
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.
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.
Loading…
Loading…