<p>A remote code execution vulnerability exists in the way that Microsoft browsers access objects in memory. The vulnerability could corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, the attacker could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p> <p>An attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft browsers, and then convince a user to view the website. The attacker could also take advantage of compromised websites, or websites that accept or host user-provided content or advertisements, by adding specially crafted content that could exploit the vulnerability. In all cases, however, an attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action, typically via an enticement in email or instant message, or by getting them to open an email attachment.</p> <p>The security update addresses the vulnerability by modifying how Microsoft browsers handle objects in memory.</p>
総合評価: CVE-2020-0878 は在野での悪用が確認済み(70/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 2.70%、84 パーセンタイル) 根拠: CISA KEV に登録(追加日 2021-11-03)。Microsoft / Edge and Internet Explorer が対象で、弱点分類 CWE-787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。
: Microsoft Edge and Internet Explorer Memory Corruption Vulnerability · CISA KEV の詳細
: 2021-11-03
: 2022-05-03
: Apply updates per vendor instructions.
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 | 2026-06-15 | 5.27% | 2.70% | -2.57% |
| 2 | 2026-03-01 | 9.82% | 5.27% | -4.55% |
| 3 | 2025-12-28 | — | 9.82% | — |
EPSS の全履歴 (全 57 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 |
|---|---|---|---|---|---|---|
| 4.2 | 3.1 | MEDIUM |
|
1.6 | 2.5 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
1.6 | 5.9 | [email protected] |
| 5.1 | 2.0 | MEDIUM |
|
4.9 | 6.4 | [email protected] |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| microsoft | internet_explorer | 11 | cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:* |
| microsoft | internet_explorer | 9 | cpe:2.3:a:microsoft:internet_explorer:9:*:*:*:*:*:*:* |
| microsoft | edge | — | cpe:2.3:a:microsoft:edge:-:*:*:*:*:*:*:* |
| microsoft | chakracore | — | cpe:2.3:a:microsoft:chakracore:-:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0878 | Patch Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0878 | US Government Resource |