CVE-2025-53845: An improper authentication vulnerability [CWE-287] in Fortinet FortiAnalyzer version 7.6.0 through 7.6.3 and b

Routine

MEDIUM 6.5REMOTEUPGRADE

CVE-2025-53845 is a medium-severity flaw (CVSS 6.5) affecting fortianalyzer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An improper authentication vulnerability [CWE-287] in Fortinet FortiAnalyzer version 7.6.0 through 7.6.3 and before 7.4.6 allows an unauthenticated attacker to obtain information pertaining to the device's health and status, or cause a denial of service via crafted OFTP requests.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-287
Published	2025-10-14
Last modified	2026-10-08

Publisher (CNA): Fortinet, Inc. · Vendor: fortinet

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-14 16:15 UTCPublished CVE record published
2026-10-08 11:10 UTCUpdated Record last modified

fortinet fortianalyzer UPGRADE

Affected: >= 6.4.0 and < 7.4.7 · >= 7.6.0 and < 7.6.4

Fixed in: 7.4.7, 7.6.4

Safe to downgrade to: a release before 6.4.0

1. Check installed version

apt-cache policy fortianalyzer || rpm -q fortianalyzer || fortianalyzer --version

2. UPGRADE to 7.4.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fortianalyzer

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fortianalyzer

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.4.0 (Debian / Ubuntu)

apt-cache madison fortianalyzer sudo apt install fortianalyzer=<VERSION_BEFORE_6.4.0> sudo apt-mark hold fortianalyzer

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list fortianalyzer sudo dnf downgrade fortianalyzer-<VERSION_BEFORE_6.4.0> sudo dnf versionlock add fortianalyzer

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-53845?

fortianalyzer: upgrade to 7.4.7, 7.6.4. Exact commands for each OS are on this page.

Is CVE-2025-53845 being exploited?

CVE-2025-53845 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-53845 affect?

CVE-2025-53845 affects fortianalyzer. Severity is medium (CVSS 6.5). An improper authentication vulnerability [CWE-287] in Fortinet FortiAnalyzer version 7.6.0 through 7.6.3 and before 7.4.6 allows an unauthenticated attacker to obtain information pertaining to the device's health and status, or cause a deni

How urgent is CVE-2025-53845?

Priority 38/100. Remotely exploitable, no login, no user action

Software pages

Fortinet vulnerabilities

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References

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