CVE-2026-42408 Details
Description
When BIG-IP DNS is provisioned, a vulnerability exists in an undisclosed TMOS Shell (tmsh) command that may allow a highly privileged authenticated attacker to view sensitive information. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
A vulnerability exists in BIG-IP DNS when provisioned, involving an undisclosed TMOS Shell (tmsh) command. This vulnerability may allow a highly privileged authenticated attacker to access sensitive information. Affected versions include BIG-IP DNS 16.1.0 to 16.1.6, 17.1.0 to 17.1.3, and 17.5.0 to 17.5.1. Vulnerable components include the TMOS Shell (tmsh) command line interface.
Users can upgrade to BIG-IP DNS version 21.0.0 or 17.5.1.4 for the 17.x branch. For versions 16.x, no update candidate currently exists, so it is recommended to upgrade to a version with the fix. After upgrading, it is advised to secure BIG-IP and external logging systems, as internal audit logs and tmsh command line history may still contain cleartext passwords. If the vulnerability is exploited by a trusted user, consider removing their access.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://my.f5.com/manage/s/article/K000157981 | [email protected] | MitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-312 | Cleartext Storage of Sensitive Information | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| f5 big-ip access policy manager | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip advanced firewall manager | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip advanced web application firewall | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip analytics | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip application acceleration manager | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip application security manager | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip application visibility and reporting | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip automation toolchain | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip carrier-grade nat | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip container ingress services | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip ddos hybrid defender | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip domain name system | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip edge gateway | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip fraud protection service | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip global traffic manager | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip link controller | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip local traffic manager | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip policy enforcement manager | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip ssl orchestrator | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip webaccelerator | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
| f5 big-ip websafe | >= 16.1.0, <= 16.1.6 >= 17.1.0, <= 17.1.3 >= 17.5.0, <= 17.5.1 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 23, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 13, 2026 | New CVE Received | [email protected] |