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CVE-2026-40060: When a BIG-IP Advanced WAF or ASM security policy is configured on a virtual server, undisclosed requests can

38
Routine
HIGH 7.5REMOTEUPGRADEUPGRADE

CVE-2026-40060 is a high-severity flaw (CVSS 7.5) affecting big-ip application security manager, big-ip advanced web application firewall. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When a BIG-IP Advanced WAF or ASM security policy is configured on a virtual server, undisclosed requests can cause the bd process to terminate.  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

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.3% (top 75%)
CISA exploited listNo
WeaknessCWE-252
Published2026-05-13
Last modified2026-10-26
Publisher (CNA): F5 Networks · Vendor: f5

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

Am I affected?

Timeline

f5 big-ip application security manager UPGRADE
Affected: >= 16.1.0 and <= 16.1.6 · >= 17.1.0 and <= 17.1.3 · >= 17.5.0 and <= 17.5.1 · 21.0.0
Fixed in: newer than 17.5.1
Safe to downgrade to: a release before 16.1.0
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. UPGRADE to newer than 17.5.1 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade big-ip-application-security-manager
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade big-ip-application-security-manager
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 16.1.0 (Debian / Ubuntu)
apt-cache madison big-ip-application-security-manager sudo apt install big-ip-application-security-manager=<VERSION_BEFORE_16.1.0> sudo apt-mark hold big-ip-application-security-manager
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list big-ip-application-security-manager sudo dnf downgrade big-ip-application-security-manager-<VERSION_BEFORE_16.1.0> 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 advanced web application firewall UPGRADE
Affected: >= 16.1.0 and <= 16.1.6 · >= 17.1.0 and <= 17.1.3 · >= 17.5.0 and <= 17.5.1 · 21.0.0
Fixed in: newer than 17.5.1
Safe to downgrade to: a release before 16.1.0
1. Check installed version
apt-cache policy big-ip-advanced-web-application-firewall || rpm -q big-ip-advanced-web-application-firewall || big-ip-advanced-web-application-firewall --version
2. UPGRADE to newer than 17.5.1 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade big-ip-advanced-web-application-firewall
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade big-ip-advanced-web-application-firewall
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 16.1.0 (Debian / Ubuntu)
apt-cache madison big-ip-advanced-web-application-firewall sudo apt install big-ip-advanced-web-application-firewall=<VERSION_BEFORE_16.1.0> sudo apt-mark hold big-ip-advanced-web-application-firewall
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list big-ip-advanced-web-application-firewall sudo dnf downgrade big-ip-advanced-web-application-firewall-<VERSION_BEFORE_16.1.0> sudo dnf versionlock add big-ip-advanced-web-application-firewall
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-2026-40060?

big-ip application security manager: upgrade to newer than 17.5.1; big-ip advanced web application firewall: upgrade to newer than 17.5.1. Exact commands for each OS are on this page.

Is CVE-2026-40060 being exploited?

CVE-2026-40060 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-2026-40060 affect?

CVE-2026-40060 affects big-ip application security manager, big-ip advanced web application firewall. Severity is high (CVSS 7.5). When a BIG-IP Advanced WAF or ASM security policy is configured on a virtual server, undisclosed requests can cause the bd process to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) are not evalua

How urgent is CVE-2026-40060?

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

Software pages

F5 BIG-IP vulnerabilities

Related CVEs

References

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