CVE-2022-21970

MEDIUM

Microsoft Edge < - Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2022-21970. PoCs published by Malwareman007.

AI-analyzed exploit summary This repository contains documentation and examples for StreamSaver.js, a library for saving large streams directly to the filesystem using service workers. It is not an exploit PoC but rather a guide on using the library.

Description

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Exploits (1)

nomisec WRITEUP 14 stars
by Malwareman007 · poc
https://github.com/Malwareman007/CVE-2022-21970

This repository contains documentation and examples for StreamSaver.js, a library for saving large streams directly to the filesystem using service workers. It is not an exploit PoC but rather a guide on using the library.

Classification
Writeup 90%
Attack Type
Other
Complexity
Moderate
Reliability
Theoretical
Target: StreamSaver.js (library)
No auth needed
Prerequisites: Browser with service worker support · HTTPS for optimal functionality
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 6.1
EPSS 0.0254
EPSS Percentile 83.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L

Details

CWE
CWE-269
Status published
Products (1)
microsoft/edge_chromium < 97.0.1072.55
Published Jan 11, 2022
Tracked Since Feb 18, 2026