8.1

CVE-2025-24472: Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability

CVSS: 8.1v3.1HighKEVRansomwareAnalyzed
Published 11-02-2025Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2025-24472 is a high (CVSS 8.1) vulnerability in Fortinet FortiOS and FortiProxy. It is known to be exploited: CISA lists it, first on 18-03-2025. It has been used in ransomware campaigns. EPSS estimates a 7.23% chance of exploitation in the next 30 days, higher than 94.3% of scored vulnerabilities.

Overall risk
90/100
0100
Critical · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
7.23%
0%100%
Low · 0.00 pp in 30 days
KEVListedCISA
RansomwareKnown useFlagged by CISA
Public exploits0No public exploits recorded

Timeline

  1. 11-02-2025
    PublishedVulnerability first disclosed.
  2. 18-03-2025
    Added to CISA KEVFortinet FortiOS and FortiProxy Authentication Bypass Vulnerability
  3. 08-04-2025
    CISA remediation dueApply mitigations per vendor instructions.
  4. 05-08-2026
    Last modifiedVulnerability information updated.

Description

An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS 7.0.0 through 7.0.16 and FortiProxy 7.2.0 through 7.2.12, 7.0.0 through 7.0.19 may allow a remote unauthenticated attacker with prior knowledge of upstream and downstream devices serial numbers to gain super-admin privileges on the downstream device, if the Security Fabric is enabled, via crafted CSF proxy requests.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

7.23%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

0.00 pp

From 7.23% on 21-09-2026

21-09-202621-10-2026
EPSS score
7.23%

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
18-03-2025
Federal due date
08-04-2025
Ransomware

CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. fortiguard.fortinet.com/psirt/FG-IR-24-535 nvd.nist.gov/vuln/detail/CVE-2025-24472

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Fortinet2 products
  • fortios≥ 7.0.0, ≤ 7.0.16 | ≥ 7.0.0, < 7.0.17
  • fortiproxy≥ 7.2.0, ≤ 7.2.12 | ≥ 7.0.0, ≤ 7.0.19 | ≥ 7.0.0, < 7.0.20 | ≥ 7.2.0, < 7.2.13

1 vendor · 2 products

References

2 links