CVE-2024-39809: The Central Manager user session refresh token does not expire when a user logs out. Note: Software versions

Routine

HIGH 7.5DOWNGRADE

CVE-2024-39809 is a high-severity flaw (CVSS 7.5) affecting big-ip next central manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Central Manager user session refresh token does not expire when a user logs out. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-613
Published	2024-08-14
Last modified	2026-06-17

Publisher (CNA): F5 Networks · Vendor: f5

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-08-14 15:15 UTCPublished CVE record published
2026-06-17 07:42 UTCUpdated Record last modified

f5 big-ip next central manager DOWNGRADE

Affected: 20.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 20.1.0

1. Check installed version

apt-cache policy big-ip-next-central-manager || rpm -q big-ip-next-central-manager || big-ip-next-central-manager --version

2. No fixed release: DOWNGRADE to a release before 20.1.0 (Debian / Ubuntu)

apt-cache madison big-ip-next-central-manager sudo apt install big-ip-next-central-manager=<VERSION_BEFORE_20.1.0> sudo apt-mark hold big-ip-next-central-manager

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list big-ip-next-central-manager sudo dnf downgrade big-ip-next-central-manager-<VERSION_BEFORE_20.1.0> sudo dnf versionlock add big-ip-next-central-manager

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-2024-39809?

big-ip next central manager: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-39809 being exploited?

CVE-2024-39809 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-2024-39809 affect?

CVE-2024-39809 affects big-ip next central manager. Severity is high (CVSS 7.5). The Central Manager user session refresh token does not expire when a user logs out. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

How urgent is CVE-2024-39809?

Priority 36/100. High severity

Software pages

F5 BIG-IP vulnerabilities

Related CVEs

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CVE-2025-23413 MEDIUM 4.4 UPGRADE When users log in through the webUI or API using local authentication, BIG-IP Next Central Manager may log sen
CVE-2024-41719 MEDIUM 4.2 UPGRADE When generating QKView of BIG-IP Next instance from the BIG-IP Next Central Manager (CM), F5 iHealth credenti
CVE-2024-37028 MEDIUM 5.3 UPGRADE BIG-IP Next Central Manager may allow an attacker to lock out an account that has never been logged in. Note:
CVE-2024-33612 MEDIUM 6.8 UPGRADE An improper certificate validation vulnerability exists in BIG-IP Next Central Manager and may allow an attack

References

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