CVE-2021-29964

A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read

published June 24, 2021

CVSS
—
EPSS
1%
Percentile
56.7
In the wild
Unconfirmed
What it is

A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00816 · 56.7th percentile
Published
2021-06-24T13:15Z
EPSS history
Timeline
  • 24 JUN 13:15Z
    A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read
    cvelistv5