CVE WatchOct 9, 2026

CVE-2011-3389

The SSL protocol, as used in certain configurations in Microsoft Windows and Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Op

CVSS

4.3

No CVSS

EPSS

73.3%

p99

KEV

—

Exploit Today

0-100

Published: Sep 6, 2011 · Last modified: Oct 9, 2026 · CWE-326

EPSS · 30d

73.3%EPSS · 30 days73.3%

2026-09-222026-10-20

Technical description

The SSL protocol, as used in certain configurations in Microsoft Windows and Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Opera, and other products, encrypts data by using CBC mode with chained initialization vectors, which allows man-in-the-middle attackers to obtain plaintext HTTP headers via a blockwise chosen-boundary attack (BCBA) on an HTTPS session, in conjunction with JavaScript code that uses (1) the HTML5 WebSocket API, (2) the Java URLConnection API, or (3) the Silverlight WebClient API, aka a "BEAST" attack.

Official references

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