CVE-2026-18453
Estado: Pendiente de análisisAlta (7.5)—
A flaw was found in 389 Directory Server. A missing NULL pointer check in the paged results handling of op_shared_search allows an unauthenticated remote attacker to crash the LDAP server by sending a crafted sequence of search requests using the USE_ONE_BACKEND control, resulting in denial of service.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.85%
- Percentil entre todas las CVEs puntuadas: 57
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access95 % - Impacto principal
T1499.004Application or System Exploitationimpact90 %
Vector de red sin autenticación (AV:N/PR:N) permite acceso remoto directo. CWE-476 (NULL pointer dereference) causa crash del servidor LDAP, evidenciando DoS de aplicación (A:H).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-476
Referencias
- https://access.redhat.com/errata/RHSA-2026:64771
- https://access.redhat.com/errata/RHSA-2026:64776
- https://access.redhat.com/errata/RHSA-2026:64778
- https://access.redhat.com/errata/RHSA-2026:64779
- https://access.redhat.com/errata/RHSA-2026:64780
- https://access.redhat.com/errata/RHSA-2026:64781
- https://access.redhat.com/errata/RHSA-2026:64783
- https://access.redhat.com/errata/RHSA-2026:64784
- https://access.redhat.com/errata/RHSA-2026:64785
- https://access.redhat.com/errata/RHSA-2026:64789
- https://access.redhat.com/errata/RHSA-2026:64790
- https://access.redhat.com/errata/RHSA-2026:64791
- https://access.redhat.com/errata/RHSA-2026:64792
- https://access.redhat.com/errata/RHSA-2026:64793
- https://access.redhat.com/errata/RHSA-2026:64804
- https://access.redhat.com/errata/RHSA-2026:65119
- https://access.redhat.com/security/cve/CVE-2026-18453
- https://bugzilla.redhat.com/show_bug.cgi?id=2509696
JSON original (NVD)
Mostrar
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