A vulnerability in the PDF parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper buffer size tracking that may result in a heap buffer over-read. An attacker could exploit this vulnerability by sending a crafted PDF file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process to crash, resulting in a denial of service condition.
総合評価: CVE-2021-1404 は中リスク（59.9/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 2.22%、80 パーセンタイル） 根拠: 直近 1 日で EPSS が +1.79% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
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。
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 | 0.43% | 2.22% | +1.79% |
| 2 | 2026-06-12 | 0.50% | 0.43% | -0.07% |
| 3 | 2026-05-28 | — | 0.50% | — |
EPSS の全履歴 （全 13 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 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2021-1404: 1 source package rows (clamav); 9 state rows across 9 repos (3.11-main, 3.12-main, 3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 9, open 0. | https://security.alpinelinux.org/vuln/CVE-2021-1404 |
debian
|
not yet assigned | CVE-2021-1404 not yet assigned priority: Debian including 1 source packages (clamav), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-1404 |
suse
|
high | CVE-2021-1404 severity important: SUSE including 34 source package names (clamav-0.103.11-150600.16.7, clamav-0.103.2-0.20.35.1, …), 121 product×package rows across 45 product lines (HPE Helion OpenStack 8, Image SLES12-SP5-SAP-Azure-LI-BYOS-Production, … (45 product lines)): Fixed 121. | https://www.suse.com/security/cve/CVE-2021-1404/ |
ubuntu
|
medium | CVE-2021-1404 medium priority: Ubuntu including 1 source packages (clamav), 7 status rows across 7 suites (bionic, focal, groovy, hirsute, trusty, upstream, xenial): released 5, needs-triage 1, not-affected 1. | https://ubuntu.com/security/CVE-2021-1404 |
| URL | タグ |
|---|---|
| https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html | Release Notes Vendor Advisory |