> CVE-2026-23988 [HIGH]

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PUBLISHED
2026-01-22 22:16
MODIFIED
2026-01-22 22:16
CVSS_SCORE V3
7.3
EPSS (Prob. Exploit)
0.21%
Top 89.3%
DATA SOURCES:
NVD đź”— 2026-01-22 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-08 OSV đź”— 2026-11-08

> DESCRIPTION

Rufus is a utility that helps format and create bootable USB flash drives. Versions 4.11 and below contain a race condition (TOCTOU) in src/net.c during the creation, validation, and execution of the Fido PowerShell script. Since Rufus runs with elevated privileges (Administrator) but writes the script to the %TEMP% directory (writeable by standard users) without locking the file, a local attacker can replace the legitimate script with a malicious one between the file write operation and the execution step. This allows arbitrary code execution with Administrator privileges. This issue has been fixed in version 4.12_BETA.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
EXPLOITABILITY
1.3
IMPACT
5.9

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
Required (R)
Nécessite une action utilisateur (clic lien, ouverture fichier, etc.)
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre 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-367

> CWE DETAILED DESCRIPTIONS

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition - The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Rufus has Local Privilege Escalation via TOCTOU Race Condition in Fido Script Handling

AFFECTED PACKAGES:
Unknown / Unknown
86 versions affected
ALIASES:
GHSA-hcx5-hrhj-xhq9

> HISTORIQUE DES MODIFICATIONS

Première apparition
22/01/2026 22:16
Source: NVD
📊 ENRICHISSEMENT 01/02/2026 06:44
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition - The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in...
Total des modifications: 1 Dernière mise à jour: 9 months ago

> REFERENCES

https://github.com/pbatard/rufus/commit/460cc5768aa45be07941b9e4ebc9bee02d282873
https://github.com/pbatard/rufus/releases/tag/v4.12_BETA
https://github.com/pbatard/rufus/security/advisories/GHSA-hcx5-hrhj-xhq9
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