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CVE-2026-126155VulnerabilityPublished

Fortinet FortiMail · Incorrect Authorization Vulnerability

Source GCVE Database

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Authoritative record:CVE-2026-126155· Critical 9.1

Not known to be exploited · CVSS 9.1 Critical · patch available : patch FortiMail as a priority.

Data as of 12 Nov 2026, 01:33 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (fortinet)CVSS 3.19.1
Patch
Available
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:R

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
FortinetFortiMailAffected
  • >=8.0.0 <=8.0.1
  • >=7.6.0 <=7.6.6
  • >=7.4.0 <=7.4.8
  • >=7.2.0 <=7.2.9
Fixed in–

Description

A incorrect authorization 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 remote attacker to obtain an authenticated IBE webmail session as any IBE recipient and read or send their encrypted mail via crafted HTTP requests.

References

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