How severe is CVE-2016-5173?

CVE-2016-5173 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2016-5173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-5173?

CVE-2016-5173 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-5173?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-5173 published?

CVE-2016-5173 was published on 2016-09-25 and last updated on 2026-06-17.

CVE-2016-5173

CVE-2016-5173 is a high-severity vulnerability in Google Chrome with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Google Chrome
Published: 2016-09-25
Last modified: 2026-06-17

Description

The extensions subsystem in Google Chrome before 53.0.2785.113 does not properly restrict access to Object.prototype, which allows remote attackers to load unintended resources, and consequently trigger unintended JavaScript function calls and bypass the Same Origin Policy via an indirect interception attack.

Frequently asked questions

What is CVE-2016-5173?: The extensions subsystem in Google Chrome before 53.0.2785.113 does not properly restrict access to Object.prototype, which allows remote attackers to load unintended resources, and consequently trigger unintended JavaScript function calls and bypass the Same Origin Policy via an indirect interception attack.
How severe is CVE-2016-5173?: CVE-2016-5173 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2016-5173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-5173?: CVE-2016-5173 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-5173?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-5173 published?: CVE-2016-5173 was published on 2016-09-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

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