CVE-2026-11405
Hidden backdoor in /bin/httpd allows admin access via plaintext backdoor password.
Is CVE-2026-11405 being exploited?
Not confirmed. CVE-2026-11405 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.77% probability of exploitation in the next 30 days.
How severe is CVE-2026-11405?
CVE-2026-11405 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-11405?
Not known from our data. No patch reference has been recorded for CVE-2026-11405, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-11405 affect?
CVE-2026-11405 affects Embedded devices running /bin/httpd web server, Router/gateway firmware with the vulnerable binary. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-11405?
Apply vendor firmware update if released; rotate rzadmin password; restrict/segregate management access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authentication bypass to admin (role=2): attacker supplies plaintext 'sys.rzadmin.password' from config to gain admin session; any username accepted.
Immediate action required
- affectedUS_AC6V2.0RTL_V15.03.06.51_multi_T
- affectedUS_AC5V1.0RTL_V15.03.06.48_multi_TDE01
- affectedUS_AC10V1.0re_V15.03.06.46_multi_TDE01
- affectedUS_W15EV1.0br_V15.11.0.5(1068_1567_841)_EN_TDE
- affectedUS_FH1201V1.0BR_V1.2.0.14(408)_EN_TD
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.