CVE-2026-3557 Memory corruption in Hue Bridge
Network-adjacent attackers can execute arbitrary code as root on Philips Hue Bridge devices via a heap buffer overflow in the HAP service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3557?
CVE-2026-3557 is a high-severity memory corruption vulnerability in Philips Hue Bridge, published on 13 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Philips Hue Bridge hap_pair_verify_handler Sub-TLV Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.
The specific flaw exists within the hap_pair_verify_handler function of the hk_hap service, which listens on TCP port 8080 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-28337.
Weakness: CWE-122
Which versions are affected by CVE-2026-3557?
It affects 1 product.
Products include Philips Hue Bridge V2 Firmware.
How do I fix CVE-2026-3557?
No fix has been published for CVE-2026-3557 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-3557 being exploited?
There is no known exploitation of CVE-2026-3557 in the wild and no public exploit code.
Other vulnerabilities in Philips Hue Bridge
- CVE-2026-3556 Philips Hue Bridge HomeKit Pair-Setup Heap-based Buffer Overflow Remote Code Execution Vulnerability
- CVE-2026-3560 Philips Hue Bridge HomeKit hk_hap_pair_storage_put Heap-based Buffer Overflow Remote Code Execution Vulnerability
- CVE-2026-3558 Philips Hue Bridge HomeKit Accessory Protocol Transient Pairing Mode Authentication Bypass Vulnerability
- CVE-2026-3559 Philips Hue Bridge HomeKit Accessory Protocol Static Nonce Authentication Bypass Vulnerability
- CVE-2026-3555 Philips Hue Bridge Zigbee Stack Custom Command Handler Heap-based Buffer Overflow Remote Code Execution Vulnerability
Sources
Also known as GHSA-65gc-f4hp-xpp4.