How severe is CVE-2026-39814?

CVE-2026-39814 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-39814 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-39814?

CVE-2026-39814 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-39814?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-39814 have an EU (EUVD) identifier?

Yes. CVE-2026-39814 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22346.

When was CVE-2026-39814 published?

CVE-2026-39814 was published on 2026-04-14 and last updated on 2026-06-17.

CVE-2026-39814

CVE-2026-39814 is a medium-severity vulnerability in Fortinet Fortiweb with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-23.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22346
Weakness: CWE-23
Affected product: Fortinet Fortiweb
Published: 2026-04-14
Last modified: 2026-06-17

Description

A relative path traversal vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.1 through 7.4.12, FortiWeb 7.2.7 through 7.2.12, FortiWeb 7.0.10 through 7.0.12 may allow attacker to execute unauthorized code or commands via <insert attack vector here>

Frequently asked questions

What is CVE-2026-39814?: A relative path traversal vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.1 through 7.4.12, FortiWeb 7.2.7 through 7.2.12, FortiWeb 7.0.10 through 7.0.12 may allow attacker to execute unauthorized code or commands via <insert attack vector here>
How severe is CVE-2026-39814?: CVE-2026-39814 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-39814 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-39814?: CVE-2026-39814 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-39814?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-39814 have an EU (EUVD) identifier?: Yes. CVE-2026-39814 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22346.
When was CVE-2026-39814 published?: CVE-2026-39814 was published on 2026-04-14 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-114

Affected products (1)

cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortiweb

CVE-2026-24858 — Critical (CVSS 9.8): An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet…
CVE-2025-59719 — Critical (CVSS 9.8): An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through…
CVE-2025-64446 — Critical (CVSS 9.8): A relative path traversal vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.1, FortiWeb 7.6.0 through 7.6.4,…
CVE-2025-25257 — Critical (CVSS 9.8): An improper neutralization of special elements used in an SQL command ('SQL Injection') vulnerability [CWE-89]…
CVE-2023-25610 — Critical (CVSS 9.8): A buffer underwrite ('buffer underflow') vulnerability in the administrative interface of Fortinet FortiOS version…
CVE-2021-42756 — Critical (CVSS 9.8): Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions,…

All CVEs affecting Fortinet Fortiweb →

Other CWE-23 vulnerabilities

CVE-2026-52813 — Critical (CVSS 10.0): Gogs is an open source self-hosted Git service. Prior to 0.14.3, organization names containing path traversal sequences…
CVE-2026-8326 — Critical (CVSS 10.0): Path traversal vulnerability in Remote Spark (https://www.Remotespark.Com/) SparkView allows reading and writing…
CVE-2026-33494 — Critical (CVSS 10.0): ORY Oathkeeper is an Identity & Access Proxy (IAP) and Access Control Decision API that authorizes HTTP requests based…
CVE-2023-3941 — Critical (CVSS 10.0): Relative Path Traversal vulnerability in ZkTeco-based OEM devices allows an attacker to write any file on the system…
CVE-2024-24578 — Critical (CVSS 10.0): RaspberryMatic is an open-source operating system for HomeMatic internet-of-things devices. RaspberryMatic / OCCU prior…
CVE-2012-6069 — Critical (CVSS 10.0): The CoDeSys Runtime Toolkit’s file transfer functionality does not perform input validation, which allows an…

Browse all CWE-23 vulnerabilities →