How severe is CVE-2026-34122?

CVE-2026-34122 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-2026-34122 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34122?

CVE-2026-34122 affects Tp-link Tapo C520ws Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34122?

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

Does CVE-2026-34122 have an EU (EUVD) identifier?

Yes. CVE-2026-34122 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18434.

When was CVE-2026-34122 published?

CVE-2026-34122 was published on 2026-04-02 and last updated on 2026-06-17.

CVE-2026-34122

CVE-2026-34122 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-121.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18434
Weakness: CWE-121
Affected product: Tp-link Tapo C520ws Firmware
Published: 2026-04-02
Last modified: 2026-06-17

Description

A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation. An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow. Successful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.

Frequently asked questions

What is CVE-2026-34122?: A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation. An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow. Successful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.
How severe is CVE-2026-34122?: CVE-2026-34122 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-2026-34122 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34122?: CVE-2026-34122 affects Tp-link Tapo C520ws Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34122?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34122 have an EU (EUVD) identifier?: Yes. CVE-2026-34122 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18434.
When was CVE-2026-34122 published?: CVE-2026-34122 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:*:*:*:*:*:*:*:*

More vulnerabilities in Tp-link Tapo C520ws Firmware

CVE-2026-34121 — High (CVSS 8.8): An authentication bypass vulnerability within the HTTP handling of the DS configuration service in TP-Link Tapo C520WS…
CVE-2026-1315 — High (CVSS 7.5): By sending crafted files to the firmware update endpoint of Tapo C220 v1 and C520WS v2, the device terminates core…
CVE-2026-0919 — High (CVSS 7.5): The HTTP parser of Tapo C210 v3, C220 v1 and C520WS v2 cameras improperly handles requests containing an excessively…
CVE-2026-0918 — High (CVSS 7.5): The Tapo C100 v5, C220 v1 and C520WS v2 cameras’ HTTP service does not safely handle POST requests containing an…
CVE-2026-8714 — Medium (CVSS 6.5): A denial-of-service vulnerability exists in the RTSP server component of TP-Link Tapo C520WS v2 due to improper…
CVE-2026-34124 — Medium (CVSS 6.5): A denial-of-service vulnerability was identified in TP-Link Tapo C520WS v2.6 within the HTTP request path parsing…

All CVEs affecting Tp-link Tapo C520ws Firmware →

Other CWE-121 (Stack-based Buffer Overflow) vulnerabilities

CVE-2026-12848 — Critical (CVSS 10.0): GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and…
CVE-2026-12847 — Critical (CVSS 10.0): GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and…
CVE-2026-12846 — Critical (CVSS 10.0): GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and…
CVE-2026-12485 — Critical (CVSS 10.0): GV-I/O Box 4E is a smart embedded device with 4 input and 4 relays output that can be controlled over Ethernet and…
CVE-2026-37541 — Critical (CVSS 10.0): Buffer overflow vulnerability in Open Vehicle Monitoring System 3 (OVMS3) 3.3.005. In canformat_gvret.cpp, the length…
CVE-2026-42996 — Critical (CVSS 10.0): JS8Call through 2.3.1 and JS8Call-improved before 3.0 have a stack-based buffer overflow via a radio transmission of…

Browse all CWE-121 (Stack-based Buffer Overflow) vulnerabilities →