How severe is CVE-2025-48840?

CVE-2025-48840 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-48840 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-48840?

CVE-2025-48840 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-48840?

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

Does CVE-2025-48840 have an EU (EUVD) identifier?

Yes. CVE-2025-48840 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208486.

When was CVE-2025-48840 published?

CVE-2025-48840 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2025-48840

CVE-2025-48840 is a medium-severity vulnerability in Fortinet Fortiweb with a CVSS 3.x base score of 5.3. 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-290.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-208486
Weakness: CWE-290
Affected product: Fortinet Fortiweb
Published: 2026-03-10
Last modified: 2026-06-17

Description

An authentication bypass by spoofing vulnerability in Fortinet FortiWeb 7.6.0 through 7.6.3, FortiWeb 7.4.0 through 7.4.8, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow a remote unauthenticated attacker to bypass hostname restrictions via a specially crafted request.

Frequently asked questions

What is CVE-2025-48840?: An authentication bypass by spoofing vulnerability in Fortinet FortiWeb 7.6.0 through 7.6.3, FortiWeb 7.4.0 through 7.4.8, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow a remote unauthenticated attacker to bypass hostname restrictions via a specially crafted request.
How severe is CVE-2025-48840?: CVE-2025-48840 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-48840 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-48840?: CVE-2025-48840 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-48840?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-48840 have an EU (EUVD) identifier?: Yes. CVE-2025-48840 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208486.
When was CVE-2025-48840 published?: CVE-2025-48840 was published on 2026-03-10 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-097

Affected products (1)

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

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