CVE-2026-7273

KEV の『悪用』には未遂(脆弱でない環境やハニーポットでの試行)が含まれ、特定の組織が侵害されたことを意味しない。

KEV の登録内容

vulnerabilityName: Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability
vendorProject: Zyxel
product: GS1900 Series Switches
dateAdded: 2026-09-21
shortDescription: Zyxel GS1900 series switches contain a stack-based buffer overflow vulnerability in the CGI program which could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.
requiredAction: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
dueDate: 2026-09-24
knownRansomwareCampaignUse: Unknown
forensicTriage: Yes
notes: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-7273
cwes: CWE-121

初めて観測: 2026-10-02T21:06:48Z / 最後に観測: 2026-10-02T21:06:48Z(last_observed_at。値の変更を最後に確認した時刻)

観測した変更

取り込み開始以降、KEV の値の変更は観測していません。

CVE レコード(CVE Program)

state: PUBLISHED
datePublished: 2026-06-16T02:20:29.847Z
dateUpdated: 2026-09-22T03:55:39.207Z

CNA の affected

Zyxel GS1900-48HPv2 firmware (<= 2.90(ABTQ.1)C0)
Zyxel GS1900-8 firmware (<= 2.90(AAHH.1)C0)
Zyxel GS1900-8HP firmware (<= 2.90(AAHI.1)C0)
Zyxel GS1900-10HP firmware (<= 2.90(AAZI.1)C0)
Zyxel GS1900-16 firmware (<= 2.90(AAHJ.1)C0)
Zyxel GS1900-24 firmware (<= 2.90(AAHL.1)C0)
Zyxel GS1900-24E firmware (<= 2.90(AAHK.1)C0)
Zyxel GS1900-24EP firmware (<= 2.90(ABTO.1)C0)
Zyxel GS1900-24HPv2 firmware (<= 2.90(ABTP.1)C0)
Zyxel GS1900-48 firmware (<= 2.90(AAHN.1)C0)

KEV と CNA で製品の表記が異なる。KEV の vendorProject・product と CNA の affected が、大文字小文字を無視した包含で一致しなかった(機械的な照合で、どちらが正しいかは判定していない)。

ベンダー公表へのリンク(CNA の references のうち vendor-advisory)

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026

リンク先の本文は取得・解析していません。

外部のページ

出典: CISA Known Exploited Vulnerabilities Catalog(CISA KEV。CC0 1.0)。詳しくは出典表記とライセンス。

出典: CVE Program(CVE レコード)。詳しくは出典表記とライセンス。

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