9.1

CVE-2024-33507: fortinet fortiisolator Insufficient Session Expiration

CVSS: 9.1v3.1CriticalAnalyzed
Published 14-10-2025Last modified 14-01-2026
Open JSON

Vulnerability summary

CVE-2024-33507 is a critical (CVSS 9.1) Insufficient Session Expiration vulnerability in fortinet fortiisolator. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
0.39%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-10-2025
    PublishedVulnerability first disclosed.
  2. 14-01-2026
    Last modifiedVulnerability information updated.

Description

An insufficient session expiration vulnerability [CWE-613] and an incorrect authorization vulnerability [CWE-863] in FortiIsolator 2.4.0 through 2.4.4, 2.3 all versions, 2.2.0, 2.1 all versions, 2.0 all versions authentication mechanism may allow remote unauthenticated attacker to deauthenticate logged in admins via crafted cookie and remote authenticated read-only attacker to gain write privilege via crafted cookie.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

0.00 pp

From 0.39% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Fortinet1 product
  • fortiisolator≥ 2.4.0, ≤ 2.4.4 | ≥ 2.3.0, ≤ 2.3.4 | ≥ 2.3.0, < 2.4.5

1 vendor · 1 product

References

1 links