CVE-2016-7152

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.

Published: 2016-09-06 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-7152 is rated Moderate Risk (59.8/100): CVSS Medium severity, with high exploitation likelihood (EPSS 13.98%, 96th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +12.73% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-7152

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.25% 13.98% +12.73%
2 2026-02-01 2.28% 1.25% -1.03%
3 2025-09-16 — 2.28% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-7152

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-7152

OS Trackers for CVE-2016-7152

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2016-7152
ubuntu low CVE-2016-7152 low priority: Ubuntu including 4 source packages (chromium-browser, firefox, oxide-qt, thunderbird), 24 status rows across 6 suites (precise, trusty, upstream, xenial, yakkety, zesty): ignored 15, DNE 5, needed 2, needs-triage 2. https://ubuntu.com/security/CVE-2016-7152

Affected software / configurations for CVE-2016-7152

Vendor Product Version Raw CPE
opera opera — cpe:2.3:a:opera:opera:-:*:*:*:*:*:*:*
apple safari — cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
mozilla firefox — cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
microsoft edge — cpe:2.3:a:microsoft:edge:-:*:*:*:*:*:*:*
microsoft internet_explorer — cpe:2.3:a:microsoft:internet_explorer:-:*:*:*:*:*:*:*
google chrome — cpe:2.3:a:google:chrome:-:*:*:*:*:*:*:*

References for CVE-2016-7152

cvelogic Threat Intelligence