> CVE-2026-20131 [CRITICAL]

« BACK_TO_HOME
PUBLISHED
2026-03-04 18:16
MODIFIED
2026-03-04 18:16
CVSS_SCORE V3
10.0
EPSS (Prob. Exploit)
43.17%
Top 1.3%
⚠ CISA_KEV
⚡ EPSS ÉLEVÉ (43.2%)
DATA SOURCES:
NVD 🔗 2026-03-04 CISA KEV 🔗 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25

> DESCRIPTION

A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device. This vulnerability is due to insecure deserialization of a user-supplied Java byte stream. An attacker could exploit this vulnerability by sending a crafted serialized Java object to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root. Note: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.

> AFFECTED_PRODUCTS

Cisco - Secure Firewall Management Center (FMC)

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EXPLOITABILITY
3.9
IMPACT
6.0

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Changed (C)
Impact s'étend au-delà du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-502

> CWE DETAILED DESCRIPTIONS

CWE-502: Deserialization of Untrusted Data - The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

> HISTORIQUE DES MODIFICATIONS

Première apparition
04/03/2026 18:16
Source: NVD
📊 ENRICHISSEMENT 01/04/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-502: Deserialization of Untrusted Data - The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
📊 ENRICHISSEMENT 19/03/2026 16:15
KEV
Champ modifié: Catalogue KEV
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 2 Dernière mise à jour: 7 months ago

> REFERENCES

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/ci...
« BACK_TO_HOME