CVE-2026-59776 Weak cryptography in FeliCa IC chips
Attackers can read or tamper with data on FeliCa IC chips due to a missing cryptographic step in the hardware design.
- 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-2026-59776?
CVE-2026-59776 is a high-severity vulnerability in Sony Corporation FeliCa IC chips, published on 21 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Missing Cryptographic Step (CWE-325) vulnerability exists in certain FeliCa IC chips shipped in or before 2017. If the vulnerability is exploited, information stored in the IC chip may be read or tampered with.
Weakness: CWE-325
Which versions are affected by CVE-2026-59776?
How do I fix CVE-2026-59776?
No fix has been published for CVE-2026-59776 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-59776 being exploited?
There is no known exploitation of CVE-2026-59776 in the wild and no public exploit code.
Sources
Also known as GHSA-4jgm-gw57-4jwf.