CVE-2025-14858 Semtech LR11xx Encrypted Firmware Disclosure
An attacker with physical SPI access can read decrypted firmware from residual memory, bypassing encryption protections in Semtech LR11xx transceivers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-14858?
CVE-2025-14858 is a medium-severity vulnerability in Semtech LR1110, published on 7 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Semtech LR11xx LoRa transceivers running early versions of firmware contains an information disclosure vulnerability in its firmware validation functionality. When a host issues a firmware validity check command via the SPI interface, the device decrypts the provided encrypted firmware package block-by-block to validate its integrity. However, the last decrypted firmware block remains uncleared in memory after the validation process completes. An attacker with access to the SPI interface can subsequently issue memory read commands to retrieve the decrypted firmware contents from this residual memory, effectively bypassing the firmware encryption protection mechanism. The attack requires physical access to the device's SPI interface.
Weakness: CWE-226
Which versions are affected by CVE-2025-14858?
How do I fix CVE-2025-14858?
No fix has been published for CVE-2025-14858 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-14858 being exploited?
There is no known exploitation of CVE-2025-14858 in the wild and no public exploit code.
Sources
Also known as GHSA-pq38-4mfg-vpxj.