CVE-2021-36181Network attack vector

Database inconsistency via unsynchronized concurrent web requests

Published Nov 2, 2021 · Updated Oct 25, 2024

Race condition in Fortinet FortiPortal before 6.0.6 allows remote authenticated users to leave customer database data inconsistent. The customer database interface fails to synchronize concurrent operations when specially coordinated web requests access a shared resource. Low-privilege portal access and precise request timing are required; successful exploitation leaves the underlying database in an inconsistent state.

CVSS severity3.1
Low
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Fortinet FortiPortal before 6.0.6 allows remote authenticated users to leave customer database data inconsistent. The customer database interface fails to synchronize concurrent operations when specially coordinated web requests access a shared resource. Low-privilege portal access and precise request timing are required; successful exploitation leaves the underlying database in an inconsistent state.

The record

CVE
CVE-2021-36181
Published
Nov 2, 2021
Updated
Oct 25, 2024
Vendor
Fortinet
Product
FortiPortal
Classifications
CWE-362, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=FortiPortal before 6.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Fortinet · FortiPortalversion=FortiPortal before 6.0.6

Published CVSS scores

3.1FortinetCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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