GHSA-jg8v-92xc-cx65 · 深刻度： critical — A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers...
A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the "check password script" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the "check password script" is used with %u and the samba-dcerpcd service is started as a system service.
総合評価: CVE-2026-4408 は高リスク（65.6/100）。CVSS 深刻度は重大。悪用される可能性が高い（EPSS 2.50%、83 パーセンタイル） 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
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 | 2026-06-23 | 1.87% | 2.50% | +0.63% |
| 2 | 2026-06-16 | 1.83% | 1.87% | +0.04% |
| 3 | 2026-06-15 | — | 1.83% | — |
EPSS の全履歴 （全 7 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 |
|---|---|---|---|---|---|---|
| 9.0 | 3.1 | CRITICAL |
|
2.2 | 6.0 | [email protected] |
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 9.0 | 3.1 | CRITICAL |
|
2.2 | 6.0 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
GHSA-jg8v-92xc-cx65 · 深刻度： critical — A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers...
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-4408 not yet assigned priority: Debian including 1 source packages (samba), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. | https://security-tracker.debian.org/tracker/CVE-2026-4408 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2026-4408 |
suse
|
critical | CVE-2026-4408 severity critical: SUSE including 172 source package names (ctdb-4.15.13+git.701.449cb7f5cd3-3.106.1, ctdb-4.15.13+git.780.d2f53cbcded-150300.3.103.1, …), 468 product×package rows across 29 product lines (SUSE Enterprise Storage 7.1, SUSE Linux Enterprise High Availability Extension 12 SP5, … (29 product lines)): Fixed 271, First Fixed 197. | https://www.suse.com/security/cve/CVE-2026-4408/ |
ubuntu
|
medium | CVE-2026-4408 medium priority: Ubuntu including 1 source packages (samba), 9 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): released 6, ignored 3. | https://ubuntu.com/security/CVE-2026-4408 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| redhat | openshift_container_platform | 4.0 | cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* |
| samba | samba | >= 4.1.0, < 4.21.0 | cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 6.0 | cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |