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CVE-2026-42409

NULL pointer dereference in F5 Big Ip Next Cloud Native Network Functions

CVSS score

7.5

EPSS probability

%0.3

Risk score

0.0

Published

5 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-42409 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

When an HTTP/2 profile and an iRule containing the HTTP::redirect or HTTP::respond command are configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) process to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-42409 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1f5big-ip next cloud-native network functions View
2f5big-ip next cloud-native network functions View
3f5big-ip next for kubernetes View
4f5big-ip access policy manager View
5f5big-ip advanced firewall manager View
6f5big-ip advanced web application firewall View
7f5big-ip analytics View
8f5big-ip application acceleration manager View
9f5big-ip application security manager View
10f5big-ip application visibility and reporting View
11f5big-ip automation toolchain View
12f5big-ip carrier-grade nat View
13f5big-ip container ingress services View
14f5big-ip ddos hybrid defender View
15f5big-ip domain name system View
16f5big-ip edge gateway View
17f5big-ip fraud protection service View
18f5big-ip global traffic manager View
19f5big-ip link controller View
20f5big-ip local traffic manager View
21f5big-ip policy enforcement manager View
22f5big-ip ssl orchestrator View
23f5big-ip webaccelerator View
24f5big-ip websafe View
25f5big-ip access policy manager View
26f5big-ip advanced firewall manager View
27f5big-ip advanced web application firewall View
28f5big-ip analytics View
29f5big-ip application acceleration manager View
30f5big-ip application security manager View
31f5big-ip application visibility and reporting View
32f5big-ip automation toolchain View
33f5big-ip carrier-grade nat View
34f5big-ip container ingress services View
35f5big-ip ddos hybrid defender View
36f5big-ip domain name system View
37f5big-ip edge gateway View
38f5big-ip fraud protection service View
39f5big-ip global traffic manager View
40f5big-ip link controller View
41f5big-ip local traffic manager View
42f5big-ip policy enforcement manager View
43f5big-ip ssl orchestrator View
44f5big-ip webaccelerator View
45f5big-ip websafe View
46f5big-ip access policy manager View
47f5big-ip access policy manager View
48f5big-ip advanced firewall manager View
49f5big-ip advanced firewall manager View
50f5big-ip advanced web application firewall View
51f5big-ip advanced web application firewall View
52f5big-ip analytics View
53f5big-ip analytics View
54f5big-ip application acceleration manager View
55f5big-ip application acceleration manager View
56f5big-ip application security manager View
57f5big-ip application security manager View
58f5big-ip application visibility and reporting View
59f5big-ip application visibility and reporting View
60f5big-ip automation toolchain View
61f5big-ip automation toolchain View
62f5big-ip carrier-grade nat View
63f5big-ip carrier-grade nat View
64f5big-ip container ingress services View
65f5big-ip container ingress services View
66f5big-ip ddos hybrid defender View
67f5big-ip ddos hybrid defender View
68f5big-ip domain name system View
69f5big-ip domain name system View
70f5big-ip edge gateway View
71f5big-ip edge gateway View
72f5big-ip fraud protection service View
73f5big-ip fraud protection service View
74f5big-ip global traffic manager View
75f5big-ip global traffic manager View
76f5big-ip link controller View
77f5big-ip link controller View
78f5big-ip local traffic manager View
79f5big-ip local traffic manager View
80f5big-ip policy enforcement manager View
81f5big-ip policy enforcement manager View
82f5big-ip ssl orchestrator View
83f5big-ip ssl orchestrator View
84f5big-ip webaccelerator View
85f5big-ip webaccelerator View
86f5big-ip websafe View
87f5big-ip websafe View
Total affected vendors: 1|Products: 87

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
8.7CVSS V40HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD
7.5CVSS V31HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-42409 is associated with the following CWEs:

CWE-476: NULL Pointer Dereference

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-42409 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://my.f5.com/manage/s/article/K000159034vendor-advisory

CVSS Vector Radar Chart

7.5 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

F
f5 logo
f5

Weakness Type (CWE & CAPEC)

CWE-476

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CVE-2026-42409 · NULL pointer dereference in F5 Big Ip Next…