CVE-2016-7152

What it is

The HTTPS protocol does not consider the role of the TCP congestion window in providing information about content length, which makes it easier for remote attackers to obtain cleartext data by leveraging a web-browser configuration in which third-party cookies are sent, aka a "HEIST" attack.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

12.8% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2016-09-06 10:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 00:52 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 12.8% in the next 30 days (EPSS).
• Severity: 5.3 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2016-09-06 10:59 UTC

Last modified

2026-06-17 00:52 UTC

Exploit probability

12.8% · EPSS, next 30 days

Weakness

CWE-200 · Information exposure

Record status

Modified

Affected

• Opera
• Apple Safari
• Mozilla Firefox
• Microsoft Edge
• Microsoft Internet Explorer
• Google Chrome

Attack profile CVSS 3.0 · 5.3

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2016-7152.md and follow it. Check whether this project is affected by CVE-2016-7152. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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