CVE-2018-0777

HIGH

Microsoft Edge - Remote Code Execution via Scripting Engine Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-0777. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC demonstrates an out-of-bounds (OOB) write vulnerability in Chakra JavaScript engine by exploiting a loop optimization flaw. The code manipulates loop bounds to trigger an OOB write, leading to potential memory corruption.

Description

Microsoft Edge in Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows an attacker to execute arbitrary code in the context of the current user, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0758, CVE-2018-0762, CVE-2018-0768, CVE-2018-0769, CVE-2018-0770, CVE-2018-0772, CVE-2018-0773, CVE-2018-0774, CVE-2018-0775, CVE-2018-0776, CVE-2018-0778, and CVE-2018-0781.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/43718

This PoC demonstrates an out-of-bounds (OOB) write vulnerability in Chakra JavaScript engine by exploiting a loop optimization flaw. The code manipulates loop bounds to trigger an OOB write, leading to potential memory corruption.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Chakra JavaScript Engine (Edge)
No auth needed
Prerequisites: Target must be running a vulnerable version of Chakra (e.g., Microsoft Edge prior to patch)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/102402
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1040100
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/43718/

Scores

CVSS v3 7.5
EPSS 0.7843
EPSS Percentile 99.5%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (2)
microsoft/chakracore < 1.7.6
microsoft/edge
Published Jan 04, 2018
Tracked Since Feb 18, 2026