CVE-2026-34121
Auth bypass in TP-Link Tapo C520WS v2.6 permits unauthenticated config changes.
Is CVE-2026-34121 being exploited?
Not confirmed. CVE-2026-34121 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 0.45% probability of exploitation in the next 30 days.
How severe is CVE-2026-34121?
CVE-2026-34121 is rated High with a CVSS score of 8.7. 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-2026-34121?
Yes. A fix has been recorded for CVE-2026-34121. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-34121 affect?
CVE-2026-34121 affects TP-Link Tapo C520WS v2.6. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-34121?
Patch when released; isolate device; monitor for config changes
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated bypass enables restricted DS actions; attacker can modify device state.
Immediate action required
- affected< 1.2.4 Build 260326 Rel.24666n
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.