Patch Forecast
Amber warning
Patch this week. CISA deadline for US federal agencies: 25 Sep 2026.

CVE-2026-94127 Exploited in the wild

F5 BIG-IP APM Heap-based Buffer Overflow Vulnerability

Risk score
73/100
CVSS
Not Scored
Added to CISA's exploited list
22 Sep 2026

Open in the live forecast Today's forecast

What to know

What it is
F5 BIG-IP APM contains a heap-based buffer overflow vulnerability when access policy and an OAuth profile are configured on a virtual server. This vulnerability could allow an unauthenticated attacker to perform remote code execution.
Affected
f5 Big-ip Apm
Fix
Apply the vendor's security update; see the linked advisory.
Exploitation
Exploited in the wild

Story map

Story map: f5 Big-ip ApmTHE FLAWSTHE FIXCVE-2026-94127F5 BIG-IP APM Heap-basedBuffer Overflow VulnerabilityexploitedFixApply the vendor's securityupdate; see the linked advisory.Who is exposedf5 Big-ip ApmAMBER · PATCH THIS WEEKf5 Big-ip ApmF5 BIG-IP APM contains aheap-based buffer overflowvulnerability when access policyand an OAuth profile areconfigured on a virtual server.This vulnerability could allow anunauthenticated attacker to…Where it standsExploited in the wildOn CISA's exploited list since 22 SepUS federal deadline 25 Sep1 outlet covering itHOW IT UNFOLDEDOfficial record on the left, the press on the right, oldest first.22 Sep · CISAAdded to the Known Exploited Vulnerabilities list25 Sep · DeadlineUS federal agencies must have patched28 Oct · BleepingComputerInfraTrust report warns of exploited flaws incritical network infrastructureCONNECTS TOSame weaknessHeap buffer overflow (CWE-122)399 other warnings in 30 days →Reported alongsideArista VeloCloud OrchestratorImproper Input Validation…CVE-2026-93952 · in 1 of the samearticle →Reported alongsideCheck Point Multiple ProductsPath Traversal VulnerabilityCVE-2026-93616 · in 1 of the samearticle →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

f5 Big-ip Apm: Amber, patch this week. F5 BIG-IP APM contains a heap-based buffer overflow vulnerability when access policy and an OAuth profile are configured on a virtual server. This vulnerability could allow an unauthenticated attacker to perform remote code execution.

The flaws

  • CVE-2026-94127: F5 BIG-IP APM Heap-based Buffer Overflow Vulnerability (exploited)

The fix

Fix: Apply the vendor's security update; see the linked advisory.

Who is exposed: f5 Big-ip Apm

Where it stands

  • Exploited in the wild
  • On CISA's exploited list since 22 Sep
  • US federal deadline 25 Sep
  • 1 outlet covering it

How it unfolded

  1. 22 Sep, CISA (official): Added to the Known Exploited Vulnerabilities list
  2. 25 Sep, Deadline (official): US federal agencies must have patched
  3. 28 Oct, BleepingComputer (press): InfraTrust report warns of exploited flaws in critical network infrastructure

Connects to

In the news

Why it is Amber

  • Not yet scored by NVD
  • Exploited in the wild (CISA KEV)

CISA required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Original description

F5 BIG-IP APM contains a heap-based buffer overflow vulnerability when access policy and an OAuth profile are configured on a virtual server. This vulnerability could allow an unauthenticated attacker to perform remote code execution.

Last activity 22 Sep 2026. Patch Forecast updates every hour.