How severe is CVE-2016-1940?

CVE-2016-1940 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2016-1940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1940?

CVE-2016-1940 primarily affects Mozilla Firefox. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1940?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-1940 published?

CVE-2016-1940 was published on 2016-01-31 and last updated on 2026-06-17.

CVE-2016-1940

CVE-2016-1940 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 5.3. 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-17.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-17
Affected product: Mozilla Firefox
Published: 2016-01-31
Last modified: 2026-06-17

Description

Mozilla Firefox before 44.0 on Android allows remote attackers to spoof the address bar via a data: URL that is mishandled during (1) shortcut opening or (2) BOOKMARK intent processing.

Frequently asked questions

What is CVE-2016-1940?: Mozilla Firefox before 44.0 on Android allows remote attackers to spoof the address bar via a data: URL that is mishandled during (1) shortcut opening or (2) BOOKMARK intent processing.
How severe is CVE-2016-1940?: CVE-2016-1940 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2016-1940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1940?: CVE-2016-1940 primarily affects Mozilla Firefox. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1940?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-1940 published?: CVE-2016-1940 was published on 2016-01-31 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:google:android:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

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