Remote Code Execution via Stack-based Buffer Overflow in ONVIF SOAP Parser in TP-Link Tapo C200 and C520WS
Published Dec 20, 2025
8.7
HIGHCVSS 4.0
EPSS 0.53%
Description
A stack-based buffer overflow vulnerability was identified in the ONVIF SOAP XML Parser in Tapo C200 v3 and C520WS v2.6. When processing XML tags with namespace prefixes, the parser fails to validate the prefix length before copying it to a fixed-size stack buffer. It allowed a crafted SOAP request with an oversized namespace prefix to cause memory corruption in stack.
An unauthenticated attacker on the same local network may exploit this flaw to enable remote code execution with elevated privileges, leading to full compromise of the device.
Affected products
-
- Version 0StatusaffectedConstraints<V3_1.4.5 Build 251104
- Version
-
- Version 0StatusaffectedConstraints<1.2.4 Build 260326 Rel.24666n
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| TP-Link Systems Inc. | Tapo C200 V3 | unaffected |
| ||||||
| TP-Link Systems Inc. | Tapo C520WS v2.6 | unaffected |
|
- 1.3.3
- 1.3.4
- 1.3.5
- 1.3.7
- 1.3.9
- 1.3.11
- 1.3.13
- 1.3.14
- 1.3.15
- 1.4.1
- 1.4.2
- 1.4.4
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (6)
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-204621 Advisory
- https://www.tp-link.com/en/support/download/tapo-c200/v3/#Firmware-Release-Notes patch
- https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes patch
- https://www.tp-link.com/us/support/download/tapo-c200/v3/#Firmware-Release-Notes patchRelease Notes
- https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes patch
- https://www.tp-link.com/us/support/faq/4849/ vendor-advisoryVendor Advisory
Change history (0)
No recorded changes yet.