9.8

CVE-2021-36186: fortinet fortinet fortiweb Out-of-bounds Write

CVSS: 9.8v3.1CriticalModified
Published 02-11-2021Last modified 25-10-2024
Open JSON

Vulnerability summary

CVE-2021-36186 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in fortinet fortinet fortiweb. EPSS estimates a 1.61% chance of exploitation in the next 30 days, higher than 75.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.61%
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. 02-11-2021
    PublishedVulnerability first disclosed.
  2. 25-10-2024
    Last modifiedVulnerability information updated.

Description

A stack-based buffer overflow in Fortinet FortiWeb version 6.4.0, version 6.3.15 and below, 6.2.5 and below allows attacker to execute unauthorized code or commands via crafted HTTP requests

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.61%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

0.00 pp

From 1.61% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.61%

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

Fortinet2 products
  • fortinet fortiwebFortiWeb 6.4.0, 6.3.15, 6.3.14, 6.3.13, 6.3.12, 6.3.11, 6.3.10, 6.3.9, 6.3.8, 6.3.7, 6.3.6, 6.3.5, 6.3.4, 6.3.3, 6.3.2, 6.3.1, 6.3.0, 6.2.5, 6.2.4, 6.2.3, 6.2.2, 6.2.1, 6.2.0
  • fortiweb≥ 6.2.0, ≤ 6.2.5 | ≥ 6.3.0, ≤ 6.3.15 | 6.4.0

1 vendor · 2 products

References

1 links