CVE-2026-75619 Overview
CVE-2026-75619 is a heap-based buffer overflow vulnerability [CWE-122] in the Real Time Streaming Protocol (RTSP) service of TP-Link Tapo C100 and C101 V5 network cameras. An authenticated attacker on the local network can send specially crafted RTSP frame data with oversized length values. The malformed frames trigger out-of-bounds heap writes inside the RTSP handler. Successful exploitation crashes the RTSP service and forces the device to reboot, producing a temporary denial-of-service condition. The flaw requires adjacent network access and low-privilege authentication, which limits remote exploitation but exposes multi-tenant Wi-Fi environments and shared home networks.
Critical Impact
Authenticated attackers on the local network can crash the RTSP service and reboot Tapo C100/C101 V5 cameras, interrupting video surveillance availability.
Affected Products
- TP-Link Tapo C100 V5
- TP-Link Tapo C101 V5
- RTSP service component on affected firmware releases
Discovery Timeline
- 2026-08-19 - CVE-2026-75619 published to NVD
- 2026-08-19 - Last updated in NVD database
Technical Details for CVE-2026-75619
Vulnerability Analysis
The Tapo C100 and C101 V5 cameras expose an RTSP service to enable local video streaming for authenticated clients. The RTSP parser fails to properly validate length fields inside incoming frame data before copying frame contents into a heap-allocated buffer. When an authenticated client submits an RTSP frame that declares a length larger than the destination buffer, the copy operation writes past the end of the allocation and corrupts adjacent heap metadata.
The corrupted heap state causes the RTSP process to abort. The camera watchdog then triggers a full device reboot to restore service. During the reboot window, live video, motion detection, and cloud upload functions are unavailable, breaking continuous surveillance coverage.
The vulnerability is classified as a heap-based buffer overflow under CWE-122. While heap overflows can sometimes lead to code execution, the observed impact reported for this issue is limited to a denial-of-service outcome affecting availability only.
Root Cause
The root cause is missing bounds validation on attacker-controlled length values inside the RTSP frame parser. The parser trusts the declared frame length and uses it directly to size a copy operation into a fixed heap allocation, resulting in an out-of-bounds write.
Attack Vector
Exploitation requires network adjacency to the camera and valid RTSP credentials. An attacker who has joined the same Wi-Fi network as the camera and obtained low-privilege credentials, whether through weak passwords, credential reuse, or shared household access, can send crafted RTSP frames to the camera's streaming port and trigger the overflow.
No verified proof-of-concept code is available in public repositories. Refer to the TP-Link Tapo FAQ and firmware release notes for vendor guidance on RTSP hardening.
Detection Methods for CVE-2026-75619
Indicators of Compromise
- Unexpected reboots of Tapo C100/C101 V5 cameras coinciding with RTSP client connections from unfamiliar local IP addresses.
- Gaps in recorded video streams or missed motion events tied to repeated RTSP session resets.
- RTSP authentication successes from devices that do not normally consume the camera's stream.
Detection Strategies
- Inspect local network traffic to the camera's RTSP port (typically TCP/554) for malformed frames with abnormally large length fields.
- Correlate camera reboot events in the Tapo cloud activity log with concurrent RTSP session activity on the local segment.
- Alert on repeated short-lived RTSP sessions from a single client, which may indicate iterative exploitation attempts.
Monitoring Recommendations
- Enable syslog or event forwarding from network gear that observes camera traffic to a centralized log platform for retention and search.
- Monitor DHCP and ARP tables for unrecognized devices joining the network segment that hosts IoT cameras.
- Track RTSP authentication failures and unusual credential use patterns against Tapo devices.
How to Mitigate CVE-2026-75619
Immediate Actions Required
- Update Tapo C100 and C101 V5 devices to the latest firmware published by TP-Link on the Tapo C100 firmware page and the Tapo C101 firmware page.
- Rotate RTSP account credentials on affected cameras and enforce strong, unique passwords.
- Isolate cameras on a dedicated IoT VLAN or guest network to restrict adjacent-network access.
Patch Information
TP-Link publishes fixed firmware images through the Tapo C100 and C101 product download pages. Consult the TP-Link Tapo C100 Firmware Notes and the TP-Link Tapo C101 Firmware Notes to identify the release that addresses CVE-2026-75619 and follow the vendor's upgrade procedure through the Tapo mobile app.
Workarounds
- Disable the RTSP account on the camera through the Tapo app if local streaming is not required, as described in the TP-Link Tapo FAQ.
- Block inbound TCP/554 to the camera at the local router or firewall except from explicitly trusted NVR or workstation IP addresses.
- Restrict wireless network access using WPA3 or WPA2 with a strong pre-shared key to reduce the pool of adjacent attackers.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
