CVE-2025-41431: When connection mirroring is configured on a virtual server, undisclosed requests can cause the Traffic Manage

This month

HIGH 7.5REMOTEDOWNGRADEDOWNGRADEDOWNGRADE

CVE-2025-41431 is a high-severity flaw (CVSS 7.5) affecting big-ip access policy manager, big-ip advanced firewall manager, big-ip analytics. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When connection mirroring is configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate in the standby BIG-IP systems in a traffic group. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-787
Published	2025-05-07
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

2025-05-07 22:15 UTCPublished CVE record published
2026-06-17 09:22 UTCUpdated Record last modified

f5 big-ip access policy manager DOWNGRADE

Affected: 17.1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 17.1.2

1. Check installed version

apt-cache policy big-ip-access-policy-manager || rpm -q big-ip-access-policy-manager || big-ip-access-policy-manager --version

2. No fixed release: DOWNGRADE to a release before 17.1.2 (Debian / Ubuntu)

apt-cache madison big-ip-access-policy-manager sudo apt install big-ip-access-policy-manager=<VERSION_BEFORE_17.1.2> sudo apt-mark hold big-ip-access-policy-manager

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

dnf --showduplicates list big-ip-access-policy-manager sudo dnf downgrade big-ip-access-policy-manager-<VERSION_BEFORE_17.1.2> sudo dnf versionlock add big-ip-access-policy-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.

f5 big-ip advanced firewall manager DOWNGRADE

Affected: 17.1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 17.1.2

1. Check installed version

apt-cache policy big-ip-advanced-firewall-manager || rpm -q big-ip-advanced-firewall-manager || big-ip-advanced-firewall-manager --version

2. No fixed release: DOWNGRADE to a release before 17.1.2 (Debian / Ubuntu)

apt-cache madison big-ip-advanced-firewall-manager sudo apt install big-ip-advanced-firewall-manager=<VERSION_BEFORE_17.1.2> sudo apt-mark hold big-ip-advanced-firewall-manager

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

dnf --showduplicates list big-ip-advanced-firewall-manager sudo dnf downgrade big-ip-advanced-firewall-manager-<VERSION_BEFORE_17.1.2> sudo dnf versionlock add big-ip-advanced-firewall-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.

f5 big-ip analytics DOWNGRADE

Affected: 17.1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 17.1.2

1. Check installed version

apt-cache policy big-ip-analytics || rpm -q big-ip-analytics || big-ip-analytics --version

2. No fixed release: DOWNGRADE to a release before 17.1.2 (Debian / Ubuntu)

apt-cache madison big-ip-analytics sudo apt install big-ip-analytics=<VERSION_BEFORE_17.1.2> sudo apt-mark hold big-ip-analytics

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

dnf --showduplicates list big-ip-analytics sudo dnf downgrade big-ip-analytics-<VERSION_BEFORE_17.1.2> sudo dnf versionlock add big-ip-analytics

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.

f5 big-ip application acceleration manager DOWNGRADE

Affected: 17.1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 17.1.2

1. Check installed version

apt-cache policy big-ip-application-acceleration-manager || rpm -q big-ip-application-acceleration-manager || big-ip-application-acceleration-manager --version

2. No fixed release: DOWNGRADE to a release before 17.1.2 (Debian / Ubuntu)

apt-cache madison big-ip-application-acceleration-manager sudo apt install big-ip-application-acceleration-manager=<VERSION_BEFORE_17.1.2> sudo apt-mark hold big-ip-application-acceleration-manager

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

dnf --showduplicates list big-ip-application-acceleration-manager sudo dnf downgrade big-ip-application-acceleration-manager-<VERSION_BEFORE_17.1.2> sudo dnf versionlock add big-ip-application-acceleration-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.

f5 big-ip application security manager DOWNGRADE

Affected: 17.1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 17.1.2

1. Check installed version

apt-cache policy big-ip-application-security-manager || rpm -q big-ip-application-security-manager || big-ip-application-security-manager --version

2. No fixed release: DOWNGRADE to a release before 17.1.2 (Debian / Ubuntu)

apt-cache madison big-ip-application-security-manager sudo apt install big-ip-application-security-manager=<VERSION_BEFORE_17.1.2> sudo apt-mark hold big-ip-application-security-manager

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

dnf --showduplicates list big-ip-application-security-manager sudo dnf downgrade big-ip-application-security-manager-<VERSION_BEFORE_17.1.2> sudo dnf versionlock add big-ip-application-security-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.

f5 big-ip domain name system DOWNGRADE

Affected: 17.1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 17.1.2

1. Check installed version

apt-cache policy big-ip-domain-name-system || rpm -q big-ip-domain-name-system || big-ip-domain-name-system --version

2. No fixed release: DOWNGRADE to a release before 17.1.2 (Debian / Ubuntu)

apt-cache madison big-ip-domain-name-system sudo apt install big-ip-domain-name-system=<VERSION_BEFORE_17.1.2> sudo apt-mark hold big-ip-domain-name-system

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

dnf --showduplicates list big-ip-domain-name-system sudo dnf downgrade big-ip-domain-name-system-<VERSION_BEFORE_17.1.2> sudo dnf versionlock add big-ip-domain-name-system

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-2025-41431?

big-ip access policy manager: downgrade or apply the listed mitigation; big-ip advanced firewall manager: downgrade or apply the listed mitigation; big-ip analytics: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-41431 being exploited?

CVE-2025-41431 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-2025-41431 affect?

CVE-2025-41431 affects big-ip access policy manager, big-ip advanced firewall manager, big-ip analytics. Severity is high (CVSS 7.5). When connection mirroring is configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate in the standby BIG-IP systems in a traffic group. Note: Software versions which have reache

How urgent is CVE-2025-41431?

Priority 41/100. High severity; Remotely exploitable, no login, no user action

Software pages

F5 BIG-IP vulnerabilities

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References

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