How severe is CVE-2016-0034?

CVE-2016-0034 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-0034 being actively exploited?

Yes. CVE-2016-0034 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-25, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2016-0034?

CVE-2016-0034 affects Microsoft Silverlight. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-0034?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2016-0034 have an EU (EUVD) identifier?

Yes. CVE-2016-0034 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-0072. It is also flagged as exploited in the EUVD (since 2022-05-25).

When was CVE-2016-0034 published?

CVE-2016-0034 was published on 2016-01-13 and last updated on 2026-08-14.

CVE-2016-0034

CVE-2016-0034 is a high-severity vulnerability in Microsoft Silverlight with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-05-25).

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.3
EPSS exploit prediction: 59% (99th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-05-25)
EU (EUVD) id: EUVD-2016-0072
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-05-25)
Affected product: Microsoft Silverlight
Published: 2016-01-13
Last modified: 2026-08-14

Description

Microsoft Silverlight 5 before 5.1.41212.0 mishandles negative offsets during decoding, which allows remote attackers to execute arbitrary code or cause a denial of service (object-header corruption) via a crafted web site, aka "Silverlight Runtime Remote Code Execution Vulnerability."

Frequently asked questions

What is CVE-2016-0034?: Microsoft Silverlight 5 before 5.1.41212.0 mishandles negative offsets during decoding, which allows remote attackers to execute arbitrary code or cause a denial of service (object-header corruption) via a crafted web site, aka "Silverlight Runtime Remote Code Execution Vulnerability."
How severe is CVE-2016-0034?: CVE-2016-0034 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-0034 being actively exploited?: Yes. CVE-2016-0034 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2016-0034?: CVE-2016-0034 affects Microsoft Silverlight. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-0034?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2016-0034 have an EU (EUVD) identifier?: Yes. CVE-2016-0034 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-0072. It is also flagged as exploited in the EUVD (since 2022-05-25).
When was CVE-2016-0034 published?: CVE-2016-0034 was published on 2016-01-13 and last updated on 2026-08-14.

References

Affected products (1)

cpe:2.3:a:microsoft:silverlight:*:*:*:*:*:*:*:*

More vulnerabilities in Microsoft Silverlight

CVE-2015-6166 — Critical (CVSS 9.3): Microsoft Silverlight 5 before 5.1.41105.00 allows remote attackers to execute arbitrary code or cause a denial of…
CVE-2015-6108 — Critical (CVSS 9.3): The Windows font library in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8;…
CVE-2015-2464 — Critical (CVSS 9.3): Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server…
CVE-2015-2463 — Critical (CVSS 9.3): Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server…
CVE-2015-2456 — Critical (CVSS 9.3): Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server…
CVE-2015-2455 — Critical (CVSS 9.3): Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server…

All CVEs affecting Microsoft Silverlight →