CVE-2026-22828: A heap-based buffer overflow vulnerability in Fortinet FortiAnalyzer Cloud 7.6.2 through 7.6.4, FortiManager C

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HIGH 8.1REMOTEUPGRADEUPGRADE

CVE-2026-22828 is a high-severity flaw (CVSS 8.1) affecting fortianalyzer cloud, fortimanager cloud. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A heap-based buffer overflow vulnerability in Fortinet FortiAnalyzer Cloud 7.6.2 through 7.6.4, FortiManager Cloud 7.6.2 through 7.6.4 may allow a remote unauthenticated attacker to execute arbitrary code or commands via specifically crafted requests. Successful exploitation would require a large amount of effort in preparation because of ASLR and network segmentation

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-122
Published	2026-04-14
Last modified	2026-10-26

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

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-14 16:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

fortinet fortianalyzer cloud UPGRADE

Affected: >= 7.6.2 and < 7.6.5

Fixed in: 7.6.5

Safe to downgrade to: a release before 7.6.2

1. Check installed version

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

2. UPGRADE to 7.6.5 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fortianalyzer-cloud

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 7.6.2 (Debian / Ubuntu)

apt-cache madison fortianalyzer-cloud sudo apt install fortianalyzer-cloud=<VERSION_BEFORE_7.6.2> sudo apt-mark hold fortianalyzer-cloud

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

dnf --showduplicates list fortianalyzer-cloud sudo dnf downgrade fortianalyzer-cloud-<VERSION_BEFORE_7.6.2> sudo dnf versionlock add fortianalyzer-cloud

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.

fortinet fortimanager cloud UPGRADE

Affected: >= 7.6.2 and < 7.6.5

Fixed in: 7.6.5

Safe to downgrade to: a release before 7.6.2

1. Check installed version

apt-cache policy fortimanager-cloud || rpm -q fortimanager-cloud || fortimanager-cloud --version

2. UPGRADE to 7.6.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fortimanager-cloud

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fortimanager-cloud

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 7.6.2 (Debian / Ubuntu)

apt-cache madison fortimanager-cloud sudo apt install fortimanager-cloud=<VERSION_BEFORE_7.6.2> sudo apt-mark hold fortimanager-cloud

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

dnf --showduplicates list fortimanager-cloud sudo dnf downgrade fortimanager-cloud-<VERSION_BEFORE_7.6.2> sudo dnf versionlock add fortimanager-cloud

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-2026-22828?

fortianalyzer cloud: upgrade to 7.6.5; fortimanager cloud: upgrade to 7.6.5. Exact commands for each OS are on this page.

Is CVE-2026-22828 being exploited?

CVE-2026-22828 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-2026-22828 affect?

CVE-2026-22828 affects fortianalyzer cloud, fortimanager cloud. Severity is high (CVSS 8.1). A heap-based buffer overflow vulnerability in Fortinet FortiAnalyzer Cloud 7.6.2 through 7.6.4, FortiManager Cloud 7.6.2 through 7.6.4 may allow a remote unauthenticated attacker to execute arbitrary code or commands via specifically crafte

How urgent is CVE-2026-22828?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

Software pages

Fortinet vulnerabilities

References

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