> CVE-2026-84461 [MEDIUM]

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PUBLISHED
2026-09-25 19:17
MODIFIED
2026-09-25 19:17
CVSS_SCORE V3
6.9
EPSS (Prob. Exploit)
0.32%
Top 75.8%
DATA SOURCES:
NVD đź”— 2026-09-25 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-23 OSV đź”— 2026-10-02

> DESCRIPTION

Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, the two-factor login step let an attacker try unlimited password guesses for any account without triggering Zammad's normal lockout or rate limiting. The response also revealed whether a guess was correct, even before two-factor authentication was checked. This made it possible to brute-force weak or reused passwords. This issue is fixed in version 7.1.2.

> AFFECTED_PRODUCTS

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

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
Low (L)
Divulgation limitée d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
Low
Divulgation limitée d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-203 CWE-307 CWE-799

> CWE DETAILED DESCRIPTIONS

CWE-203: Observable Discrepancy - The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor. | CWE-307: Improper Restriction of Excessive Authentication Attempts - The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame. | CWE-799: Improper Control of Interaction Frequency - The product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests.

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Zammad: Missing rate limiting allows password brute-forcing during two-factor login

AFFECTED PACKAGES:
Unknown / Unknown
17 versions affected
ALIASES:
GHSA-6vh5-pfp2-5rmh

> HISTORIQUE DES MODIFICATIONS

Première apparition
25/09/2026 19:17
Source: NVD
đź“Š ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-203: Observable Discrepancy - The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor. | CWE-307: Improper R...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/zammad/zammad/commit/d51254f1c6da13f6ee27636a5c82e53f7e59666b
https://github.com/zammad/zammad/security/advisories/GHSA-6vh5-pfp2-5rmh
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