CVE-2016-0034
Microsoft Silverlight Runtime Remote Code Execution Vulnerability
- High 8.8
- Exploited: added to CISA KEV 25 May 2022
- Used in ransomware campaigns
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."
Key facts
- Published
- 13 Jan 2016
- Last changed
- 14 Aug 2026
- Assigned by
- microsoft
- KEV added
- 25 May 2022
- KEV fix due
- 15 Jun 2022
- Used in ransomware
- Yes, according to CISA
- EPSS
- 69.397% likely to be exploited in the next 30 days, higher than 99.371% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 8.8CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
What to do
- The impacted products are end-of-life and should be disconnected if still in use.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a |
|
Timeline
- 13 Jan 2016 Published
- 25 May 2022 CVE-2016-0034 added to CISA KEV
- 25 May 2022 Added to the CISA KEV catalogue