CVE-2026-7273(zyxel gs1900-8 firmware)の深刻度・悪用状況・対象バージョン
8.8 重要(CVSS 3.x) 悪用確認済み(CISA KEV) EPSS 取得中…
概要
A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.
実際の攻撃で悪用されています。 CISA KEV への追加日: 2026-09-21。対象製品を使っている場合は最優先で対策してください。
CISA の要求対応: 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.
CISA の要求対応: 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.
影響を受ける製品
| ベンダー | 製品 | 対象バージョン |
|---|---|---|
| zyxel | gs1900-8_firmware | < 2.90\(aahh.2\)c0 |
| zyxel | gs1900-8hp_firmware | < 2.90\(aahi.2\)c0 |
| zyxel | gs1900-10hp_firmware | < 2.90\(aazi.2\)c0 |
| zyxel | gs1900-16_firmware | < 2.90\(aahj.2\)c0 |
| zyxel | gs1900-24_firmware | < 2.90\(aahl.2\)c0 |
| zyxel | gs1900-24e_firmware | < 2.90\(aahk.2\)c0 |
| zyxel | gs1900-24ep_firmware | < 2.90\(abto.2\)c0 |
| zyxel | gs1900-24hpv2_firmware | < 2.90\(abtp.2\)c0 |
| zyxel | gs1900-48_firmware | < 2.90\(aahn.2\)c0 |
| zyxel | gs1900-48hpv2_firmware | < 2.90\(abtq.2\)c0 |
基本情報
- 公開日
- 2026-06-16
- 最終更新
- 2026-10-25
- NVD の状態
- Analyzed
- 弱点の種類
- CWE-121
対策の進め方
- 上の表で、使っている製品とバージョンが対象か確認します。
- ベンダーの公式アドバイザリ(下の参考情報の「Vendor Advisory」「Patch」)で修正版・回避策を確認します。
- 悪用が確認されているため、パッチ適用までの間もアクセス制限・侵害の痕跡確認を検討します。
- 日本語の情報は JVN iPedia で CVE-2026-7273 を検索 できます。
参考情報
- 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 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273 Third Party AdvisoryUS Government Resource
- https://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-government-records-wordpress-exploitation ExploitThird Party Advisory
- NVD: CVE-2026-7273
- CVE.org: CVE-2026-7273
データ出典: NIST NVD、CISA KEV、FIRST EPSS。翻訳は参考情報で、正確性は原文を優先してください。