Is CVE-2016-1963 in the CISA KEV catalog?

No. CVE-2016-1963 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-1963?

CVE-2016-1963 has a CVSS v3 base score of 7.4 (HIGH).

What is the EPSS score for CVE-2016-1963?

CVE-2016-1963 has an EPSS score of 0.30% (22th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-1963?

Upgrade firefox on debian unstable to 45.0-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2016-1963

HIGH

7.4

CVSS v3

NVD

Description

The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or cause a denial of service (memory corruption) by changing a file during a FileReader API read operation.

CWE-119Buffer Overflow CWE-264Permissions, Privileges, and Access Controls

How to fix

Remediation Available

firefoxDebian

Fixed in:45.0-1CVE-2016-1963

firefoxUbuntu

Fixed in:45.0+build2-0ubuntu0.14.04.1USN-2917-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.30%probability of exploitation in 30 days

22ndpercentile

Low risk: more likely to be exploited than 22% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Other references8

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.