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Sid 1-48052


BROWSER-IE Multiple browsers memory corruption attempt


This event is generated when malicious JavaScript targeted against Microsoft Edge or Mozilla Firefox is detected on the network.


Attempted User Privilege Gain


CVSS base score 7.5

CVSS impact score 5.9

CVSS exploitability score 1.6

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Detailed information

A memory corruption vulnerability is identified in Microsoft Edge and Mozilla Firefox. This vulnerability can be used to achieve remote code execution. CVE-2018-8505: A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka "Chakra Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-8503, CVE-2018-8510, CVE-2018-8511, CVE-2018-8513.

Affected systems

  • microsoft chakracore -
  • microsoft edge -

Ease of attack


Access Vector

Access Complexity


False positives

None known

False negatives

None known

Corrective action


  • Cisco Talos Intelligence Group

Additional References

  • CVE-2019-0771
  • CVE-2019-1052
  • CVE-2019-1139
  • CVE-2019-1197
  • CVE-2019-9810