Vulnerability-Lookup

CVE-2026-8797 (GCVE-0-2026-8797)

Vulnerability from cvelistv5 – Published: 2026-06-26 04:14 – Updated: 2026-06-26 12:19

Summary

An access control deficiency vulnerability exists in ExpressUpdate Agent for Windows. If a malicious user gains access to the product, arbitrary code could be executed with SYSTEM privileges.

Severity

8.5 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-26 12:19 UTC

CWE

CWE-782 - Exposed IOCTL with Insufficient Access Control

Assigner

NEC jpcert root

References

1 reference

URL	Tags
https://jpn.nec.com/security-info/secinfo/nv26-00…

Impacted products

1 product

Vendor	Product	Version	CPE status
NEC Corporation	ExpressUpdate Agent for Windows	Affected: 3.24 and prior	guessed

Credits

MASAHIRO IIDA of LAC Co., Ltd.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-8797

Vulnerability from fkie_nvd - Published: 2026-06-26 05:16 - Updated: 2026-06-26 20:23

Severity

8.5 (High) - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Summary

An access control deficiency vulnerability exists in ExpressUpdate Agent for Windows. If a malicious user gains access to the product, arbitrary code could be executed with SYSTEM privileges.

References

	URL	Tags
	psirt-info@cyber.jp.nec.com	https://jpn.nec.com/security-info/secinfo/nv26-004_en.html

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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      "affectedData": [
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          "defaultStatus": "unknown",
          "product": "ExpressUpdate Agent for Windows",
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GHSA-CXM7-54MF-PWWG

Vulnerability from github – Published: 2026-06-26 06:30 – Updated: 2026-06-26 06:30

Details

An access control deficiency vulnerability exists in ExpressUpdate Agent for Windows. If a malicious user gains access to the product, arbitrary code could be executed with SYSTEM privileges.

Severity

8.5 (High)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

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  ],
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    "github_reviewed_at": null,
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    "severity": "HIGH"
  },
  "details": "An access control deficiency vulnerability exists in ExpressUpdate Agent for Windows. If a malicious user gains access to the product, arbitrary code could be executed with SYSTEM privileges.",
  "id": "GHSA-cxm7-54mf-pwwg",
  "modified": "2026-06-26T06:30:33Z",
  "published": "2026-06-26T06:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8797"
    },
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      "type": "WEB",
      "url": "https://jpn.nec.com/security-info/secinfo/nv26-004_en.html"
    }
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      "type": "CVSS_V4"
    }
  ]
}

JVNDB-2026-000088

Vulnerability from jvndb - Published: 2026-06-26 05:25 - Updated:2026-06-26 05:25

Severity

7.8 (High) - cvssV3_0 - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

ExpressUpdate Agent for Windows improper access restriction on its named pipe

Details

ExpressUpdate Agent for Windows provided by NEC Corporation is the software module for NEC server products, to support remote management of installed software. ExpressUpdate Agent for Windows configures its named pipe with an improper access restriction.

Exposed IOCTL with Insufficient Access Control (CWE-782) - CVE-2026-8797

MASAHIRO IIDA of LAC Co., Ltd. reported this vulnerability to IPA. JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN35146924/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-8797
	No Mapping(CWE-Other)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

NEC Corporation

ExpressUpdate Agent for Windows

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000088.html",
  "dc:date": "2026-06-26T14:25+09:00",
  "dcterms:issued": "2026-06-26T14:25+09:00",
  "dcterms:modified": "2026-06-26T14:25+09:00",
  "description": "ExpressUpdate Agent for Windows provided by NEC Corporation is the software module for NEC server products, to support remote management of installed software.\r\nExpressUpdate Agent for Windows configures its named pipe with an improper access restriction.\u003ca href=\u0027https://cwe.mitre.org/data/definitions/782.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003ca href=\u0027https://www.cve.org/CVERecord?id=CVE-2026-8797\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eExposed IOCTL with Insufficient Access Control (CWE-782) - CVE-2026-8797\u003c/li\u003e\u003c/ul\u003eMASAHIRO IIDA of LAC Co., Ltd. reported this vulnerability to IPA.\r\nJPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000088.html",
  "sec:cpe": {
    "#text": "cpe:/a:nec:expressupdate_agent_for_windows",
    "@product": "ExpressUpdate Agent for Windows",
    "@vendor": "NEC Corporation",
    "@version": "2.2"
  },
  "sec:cvss": {
    "@score": "7.8",
    "@severity": "High",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000088",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN35146924/index.html",
      "@id": "JVN#35146924",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-8797",
      "@id": "CVE-2026-8797",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "ExpressUpdate Agent for Windows improper access restriction on its named pipe"
}

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.

Detection rules are retrieved from Rulezet.

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.

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.

Action not permitted

CVE-2026-8797 (GCVE-0-2026-8797)

FKIE_CVE-2026-8797

GHSA-CXM7-54MF-PWWG

JVNDB-2026-000088

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Related by attack behaviour