A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition, or to execute arbitrary code on an affected device. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted Smart Install message to an affected device on TCP port 4786. A successful exploit could allow the attacker to cause a buffer overflow on the affected device, which could have the following impacts: Triggering a reload of the device, Allowing the attacker to execute arbitrary code on the device, Causing an indefinite loop on the affected device that triggers a watchdog crash. Cisco Bug IDs: CSCvg76186.
総合評価: CVE-2018-0171 は在野悪用が確認された重大脅威(99/100)。CVSS 深刻度は重大。悪用される可能性が高い(EPSS 92.90%、100 パーセンタイル) 根拠: CISA KEV に登録(追加日 2021-11-03)。Cisco / IOS and IOS XE が対象で、弱点分類 CWE-20の悪用が確認されています。未認証でリモート管理権限を奪取されるリスクが極めて高い。 推奨対応: CISA の対応期限を過ぎています。緊急のパッチ適用を最優先に検討してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
: Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability · CISA KEV の詳細
: 2021-11-03
: 2022-05-03
: Apply updates per vendor instructions.
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| 44451 | exploit_db | edb | 2018-03-29 | Exploit-DB ↗ |
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2026-05-22 | 93.03% | 92.90% | -0.13% |
| 2 | 2026-05-11 | 92.67% | 93.03% | +0.36% |
| 3 | 2026-04-28 | — | 92.67% | — |
EPSS の全履歴 (全 75 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| URL | タグ |
|---|---|
| http://www.securityfocus.com/bid/103538 | Third Party Advisory VDB Entry |
| http://www.securitytracker.com/id/1040580 | Third Party Advisory VDB Entry |
| https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 | Third Party Advisory US Government Resource |
| https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 | Third Party Advisory US Government Resource |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi2 | Vendor Advisory |
| https://www.darkreading.com/perimeter/attackers-exploit-cisco-switch-issue-as-vendor-warns-of-yet-another-critical-flaw/d/d-id/1331490 | Press/Media Coverage |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0171 | US Government Resource |