How severe is CVE-2026-34120?

CVE-2026-34120 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-34120 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34120?

CVE-2026-34120 affects Tp-link Tapo C520ws Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34120?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-34120 have an EU (EUVD) identifier?

Yes. CVE-2026-34120 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18430.

When was CVE-2026-34120 published?

CVE-2026-34120 was published on 2026-04-02 and last updated on 2026-06-17.

CVE-2026-34120

CVE-2026-34120 is a medium-severity vulnerability in Tp-link Tapo C520ws Firmware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18430
Weakness: CWE-122
Affected product: Tp-link Tapo C520ws Firmware
Published: 2026-04-02
Last modified: 2026-06-17

Description

A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the asynchronous parsing of local video stream content due to insufficient alignment and validation of buffer boundaries when processing streaming inputs.An attacker on the same network segment could trigger heap memory corruption conditions by sending crafted payloads that cause write operations beyond allocated buffer boundaries. Successful exploitation causes a Denial-of-Service (DoS) condition, causing the device’s process to crash or become unresponsive.

Frequently asked questions

What is CVE-2026-34120?: A heap-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within the asynchronous parsing of local video stream content due to insufficient alignment and validation of buffer boundaries when processing streaming inputs.An attacker on the same network segment could trigger heap memory corruption conditions by sending crafted payloads that cause write operations beyond allocated buffer boundaries. Successful exploitation causes a Denial-of-Service (DoS) condition, causing the device’s process to crash or become unresponsive.
How severe is CVE-2026-34120?: CVE-2026-34120 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-34120 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34120?: CVE-2026-34120 affects Tp-link Tapo C520ws Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34120?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34120 have an EU (EUVD) identifier?: Yes. CVE-2026-34120 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18430.
When was CVE-2026-34120 published?: CVE-2026-34120 was published on 2026-04-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tp-link:tapo_c520ws_firmware:*:*:*:*:*:*:*:*

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