CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NCVE-2026-126151 fortinet fortimail
High (7.5) in fortinet fortimail. EPSS 0.6% estimated probability of exploitation activity in the next 30 days.
On this page
A incorrect implementation of authentication algorithm 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 gain elevation of privilege (account takeover) via a crafted request.
Severity
- EPSS
- 0.6% estimated probability of exploitation activity in the next 30 days; 48th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-303 Incorrect Implementation of Authentication Algorithm
- OWASP Top 10
- A07:2025 Authentication Failures
- Published
- Modified
- Assigned by
- fortinet (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Explain CVE-2026-126151 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-126151?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-126151?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-126151 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Fortinet FortiMail | from 8.0.0 through 8.0.1 |
| Fortinet FortiMail | from 7.6.0 through 7.6.6 |
| Fortinet FortiMail | from 7.4.0 through 7.4.8 |
| Fortinet FortiMail | from 7.2.0 through 7.2.9 |
Attack patterns (CAPEC)
- CAPEC-90 Reflection Attack in Authentication Protocol Likelihood: High · Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.