From gbhackers.com
Sanboxescaper ( pseudonym – Twitter), a hacker who used to reveal zero-day bugs online leaked another Windows Zero-day flaw that allows attacker overwrite an arbitrary data in the targeted file.
She released a Proof-of-concept (PoC) exploit in GitHub and it was a fourth Windows zero-day bug that she discovered and leaked last year.
Very recently she posted windows Zero-day vulnerability POC online that contain exploit code that allow attacker to read any file in the vulnerable windows system.