PatchTheCVECVE-2026-34118: A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C210 v3.6 and C520WS v
CVE-2026-34118 is a medium-severity flaw (CVSS 6.5) affecting tapo c520ws firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C210 v3.6 and C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to insufficient boundary validation when handling externally supplied HTTP input. An attacker on the same network segment could trigger heap memory corruption conditions by sending crafted payloads that cause wri
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Adjacent network |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 69%) |
| CISA exploited list | No |
| Weakness | CWE-122 |
| Published | 2026-04-02 |
| Last modified | 2026-10-19 |
Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-34118?
tapo c520ws firmware: upgrade to 1.2.4. Exact commands for each OS are on this page.
Is CVE-2026-34118 being exploited?
CVE-2026-34118 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-34118 affect?
CVE-2026-34118 affects tapo c520ws firmware. Severity is medium (CVSS 6.5). A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C100/C101 v5, C210 v3.6 and C520WS v2.6 in the HTTP POST body parsing logic due to missing validation of remaining buffer capacity after dynamic allocation, due to in
How urgent is CVE-2026-34118?
Priority 30/100. No elevated risk signals yet.
Software pages
Related CVEs
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- CVE-2026-34124 MEDIUM 6.5 UPGRADE A denial-of-service vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP request path pars
- CVE-2026-34122 MEDIUM 6.5 UPGRADE A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration
- CVE-2026-34119 MEDIUM 6.5 UPGRADE A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP parsing