CVE-2025-64471Network attack vector

Authentication bypass via reusable password hashes

Published Dec 9, 2025 · Updated Jan 14, 2026

Authentication bypass in affected Fortinet FortiWeb releases allows remote attackers to log in with a password hash via crafted HTTP/HTTPS requests. The HTTP/HTTPS authentication path accepts an account's password hash as the presented credential instead of requiring the underlying password. Exploitation requires possession of a valid account hash; successful requests authenticate as that account and permit its authorized operations.

CVSS severity4.9
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in affected Fortinet FortiWeb releases allows remote attackers to log in with a password hash via crafted HTTP/HTTPS requests. The HTTP/HTTPS authentication path accepts an account's password hash as the presented credential instead of requiring the underlying password. Exploitation requires possession of a valid account hash; successful requests authenticate as that account and permit its authorized operations.

The record

CVE
CVE-2025-64471
Published
Dec 9, 2025
Updated
Jan 14, 2026
Vendor
Fortinet
Product
FortiWeb
Classifications
CWE-836, T1550.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 2026Record 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=7.0.0 <=7.0.11
  2. Affected versionversion=7.2.0 <=7.2.11
  3. Affected versionversion=7.4.0 <=7.4.10
  4. Affected versionversion=7.6.0 <=7.6.5
  5. Affected versionversion=8.0.0 <=8.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiWebversion=7.0.0 <=7.0.11; version=7.2.0 <=7.2.11; version=7.4.0 <=7.4.10; version=7.6.0 <=7.6.5; version=8.0.0 <=8.0.1

Published CVSS scores

4.9Fortinet, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-836Use of Password Hash Instead of Password for Authentication
T1550.002Use Alternate Authentication Material: Pass the Hash

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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