Improper Authentication in Fortinet FortiMail

Publication date: 2026-11-11

Last updated on: 2026-11-11

Assigner: Fortinet, Inc.

Description

A improper authentication vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6, FortiMail 7.4.0 through 7.4.8, FortiMail 7.2 all versions may allow an unauthenticated attacker to gain access to other users' secure email accounts via crafted HTTP requests.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-11-11

Last Modified

2026-11-11

Generated

2026-11-12

EPSS Evaluated

N/A

NVD

CVE-2026-126157

EUVD

EUVD-2026-123823

Affected Vendors & Products

Vendor	Product	Version / Range
Fortinet	FortiMail	From 8.0.0 (inc) to 8.0.1 (inc)
Fortinet	FortiMail	From 7.6.0 (inc) to 7.6.6 (inc)
Fortinet	FortiMail	From 7.4.0 (inc) to 7.4.8 (inc)
Fortinet	FortiMail	From 7.2.0 (inc) to 7.2.9 (inc)
Fortinet	FortiMail	From 7.0.0 (inc) to 7.0.9 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-287	When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Attack-Flow Graph

AI Quick Actions have not been generated yet.

Hi! I’m here to help you understand CVE-2026-126157. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70

EPSS Chart

Security Radar

News mentioning this vulnerability

Loading related security news...