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CVE-2026-59762

BIG-IP HTTP/2 vulnerability

No known exploitation. EPSS puts it in the 47th percentile. Fixed versions are out.

CVSS 3.17.5HighEPSS percentile47th0.6% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products8 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • F5 BIG-IPAffected: ≥ 21.1.0, < 21.1.0.1Upgrade to: 21.1.0.1Affected: ≥ 21.0.0, < 21.0.0.3Upgrade to: 21.0.0.3Affected: ≥ 17.5.0, < 17.5.1.8Upgrade to: 17.5.1.8Affected: ≥ 17.1.0, < 17.1.3.4Upgrade to: 17.1.3.4Stated by: CVE record
  • F5 BIG-IP Next for KubernetesAffected: ≥ 2.3.0, < 2.3.2Upgrade to: 2.3.2Affected: ≥ 2.0.0, < 2.2.3Upgrade to: 2.2.3Stated by: CVE record
  • F5 BIG-IP Next SPKAffected: 1.9.0Upgrade to: not statedAffected: ≥ 1.7.0, < 1.7.18Upgrade to: 1.7.18Stated by: CVE record
  • F5 BIG-IP Next CNFAffected: ≥ 2.3.0, < 2.3.2Upgrade to: 2.3.2Affected: ≥ 2.0.0, < 2.2.3Upgrade to: 2.2.3Affected: ≥ 1.1.0, < 1.4.3Upgrade to: 1.4.3Stated by: CVE record
  • F5 Big-ip Next Cloud-native Network FunctionsAffected: ≥ 1.1.0, < 1.4.3Upgrade to: 1.4.3Stated by: NVD

Versions as the sources state them. 1 more product has version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

When an HTTP/2 profile is configured on a virtual server, undisclosed requests can cause an increase in memory resource utilization.   Impact: System performance can degrade until the TMM process is either forced to restart or is manually restarted. This vulnerability allows a remote, unauthenticated attacker to cause a degradation of service that can lead to a denial-of-service (DoS) on the BIG-IP system. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS47th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.6% chance of exploitation activity in the next 30 days, which ranks it in the 47th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

8 events over 22 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. OpenVAS check added
  3. Publishedweakness classified, att&ck mapped, record updated, record updated

Affected products

And 1 more affected product. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Scored 7.5 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality NoneNo confidentiality impact
  • Integrity NoneNo integrity impact
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

In the news

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We'll flag the next CVE, public exploit or patch for BIG-IP, not every advisory.