iControl REST and tmsh vulnerability
Summary
| CVE | CVE-2026-42937 |
|---|---|
| State | PUBLISHED |
| Assigner | f5 |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-13 16:16:50 UTC |
| Updated | 2026-06-17 18:10:16 UTC |
| Description | Incorrect permission assignment vulnerabilities exist in BIG-IP and BIG-IQ TMOS Shell (tmsh) arp and ndp commands, and in BIG-IP iControl REST. These vulnerabilities may allow an authenticated attacker to view adjacent network information. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. |
Risk And Classification
Primary CVSS: v4.0 7.1 HIGH from [email protected]
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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:X
EPSS: 0.002030000 probability, percentile 0.101680000 (date 2026-06-22)
Problem Types: CWE-732 | CWE-732 CWE-732 Incorrect Permission Assignment for Critical Resource
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 7.1 | HIGH | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 7.1 | HIGH | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| 4.0 | CNA | CVSS | 6.8 | MEDIUM | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| 3.1 | [email protected] | Secondary | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| 3.1 | CNA | CVSS | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| 3.1 | CNA | CVSS | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
LowUser Interaction
NoneConfidentiality
HighIntegrity
NoneAvailability
NoneSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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:X
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | F5 | Big-ip Access Policy Manager | All | All | All | All |
| Application | F5 | Big-ip Access Policy Manager | All | All | All | All |
| Application | F5 | Big-ip Access Policy Manager | All | All | All | All |
| Application | F5 | Big-ip Advanced Firewall Manager | All | All | All | All |
| Application | F5 | Big-ip Advanced Firewall Manager | All | All | All | All |
| Application | F5 | Big-ip Advanced Firewall Manager | All | All | All | All |
| Application | F5 | Big-ip Advanced Web Application Firewall | All | All | All | All |
| Application | F5 | Big-ip Advanced Web Application Firewall | All | All | All | All |
| Application | F5 | Big-ip Advanced Web Application Firewall | All | All | All | All |
| Application | F5 | Big-ip Analytics | All | All | All | All |
| Application | F5 | Big-ip Analytics | All | All | All | All |
| Application | F5 | Big-ip Analytics | All | All | All | All |
| Application | F5 | Big-ip Application Acceleration Manager | All | All | All | All |
| Application | F5 | Big-ip Application Acceleration Manager | All | All | All | All |
| Application | F5 | Big-ip Application Acceleration Manager | All | All | All | All |
| Application | F5 | Big-ip Application Security Manager | All | All | All | All |
| Application | F5 | Big-ip Application Security Manager | All | All | All | All |
| Application | F5 | Big-ip Application Security Manager | All | All | All | All |
| Application | F5 | Big-ip Application Visibility And Reporting | All | All | All | All |
| Application | F5 | Big-ip Application Visibility And Reporting | All | All | All | All |
| Application | F5 | Big-ip Application Visibility And Reporting | All | All | All | All |
| Application | F5 | Big-ip Automation Toolchain | All | All | All | All |
| Application | F5 | Big-ip Automation Toolchain | All | All | All | All |
| Application | F5 | Big-ip Automation Toolchain | All | All | All | All |
| Application | F5 | Big-ip Carrier-grade Nat | All | All | All | All |
| Application | F5 | Big-ip Carrier-grade Nat | All | All | All | All |
| Application | F5 | Big-ip Carrier-grade Nat | All | All | All | All |
| Application | F5 | Big-ip Container Ingress Services | All | All | All | All |
| Application | F5 | Big-ip Container Ingress Services | All | All | All | All |
| Application | F5 | Big-ip Container Ingress Services | All | All | All | All |
| Application | F5 | Big-ip Ddos Hybrid Defender | All | All | All | All |
| Application | F5 | Big-ip Ddos Hybrid Defender | All | All | All | All |
| Application | F5 | Big-ip Ddos Hybrid Defender | All | All | All | All |
| Application | F5 | Big-ip Domain Name System | All | All | All | All |
| Application | F5 | Big-ip Domain Name System | All | All | All | All |
| Application | F5 | Big-ip Domain Name System | All | All | All | All |
| Application | F5 | Big-ip Edge Gateway | All | All | All | All |
| Application | F5 | Big-ip Edge Gateway | All | All | All | All |
| Application | F5 | Big-ip Edge Gateway | All | All | All | All |
| Application | F5 | Big-ip Fraud Protection Service | All | All | All | All |
| Application | F5 | Big-ip Fraud Protection Service | All | All | All | All |
| Application | F5 | Big-ip Fraud Protection Service | All | All | All | All |
| Application | F5 | Big-ip Global Traffic Manager | All | All | All | All |
| Application | F5 | Big-ip Global Traffic Manager | All | All | All | All |
| Application | F5 | Big-ip Global Traffic Manager | All | All | All | All |
| Application | F5 | Big-ip Link Controller | All | All | All | All |
| Application | F5 | Big-ip Link Controller | All | All | All | All |
| Application | F5 | Big-ip Link Controller | All | All | All | All |
| Application | F5 | Big-ip Local Traffic Manager | All | All | All | All |
| Application | F5 | Big-ip Local Traffic Manager | All | All | All | All |
| Application | F5 | Big-ip Local Traffic Manager | All | All | All | All |
| Application | F5 | Big-ip Policy Enforcement Manager | All | All | All | All |
| Application | F5 | Big-ip Policy Enforcement Manager | All | All | All | All |
| Application | F5 | Big-ip Policy Enforcement Manager | All | All | All | All |
| Application | F5 | Big-ip Ssl Orchestrator | All | All | All | All |
| Application | F5 | Big-ip Ssl Orchestrator | All | All | All | All |
| Application | F5 | Big-ip Ssl Orchestrator | All | All | All | All |
| Application | F5 | Big-ip Webaccelerator | All | All | All | All |
| Application | F5 | Big-ip Webaccelerator | All | All | All | All |
| Application | F5 | Big-ip Webaccelerator | All | All | All | All |
| Application | F5 | Big-ip Websafe | All | All | All | All |
| Application | F5 | Big-ip Websafe | All | All | All | All |
| Application | F5 | Big-ip Websafe | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | F5 | BIG-IP | unaffected 21.1.0 * custom | Not specified |
| CNA | F5 | BIG-IP | affected 21.0.0 21.0.0.2 custom | Not specified |
| CNA | F5 | BIG-IP | affected 17.5.0 17.5.1.6 custom | Not specified |
| CNA | F5 | BIG-IP | affected 17.1.0 17.1.3.2 custom | Not specified |
| CNA | F5 | BIG-IP | affected 16.1.0 * custom | Not specified |
| CNA | F5 | BIG-IQ | affected 8.4.0 * custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| my.f5.com/manage/s/article/K000161018 | [email protected] | my.f5.com | Mitigation, Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: F5 (en)
There are currently no legacy QID mappings associated with this CVE.