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CVE-2013-3896· NVD / CVE Program· CNA microsoft

Microsoft Silverlight 5 before 5.1.20913.0 does not properly validate pointers during access to Silverlight elements, which allows remote at

Microsoft Silverlight 5 before 5.1.20913.0 does not properly validate pointers during access to Silverlight elements, which allows remote attackers to obtain sensitive information via a crafted Silverlight application, aka "Silverlight Vulnerability."

MediumCVSS 5.5 · v3.1KEVWeaponized No fix recorded
Published
Oct 9, 2013
Updated
Jun 16, 2026
EPSS
68.0% · 99th percentile
CWE
—
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Action score

72

This week

Don’t wait for the next maintenance window.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
30 / 30 · Listed
EPSS
20 / 30 · 68.0%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on May 25, 2022. That signals real attacks, not theory.

Remediation deadline for government agencies: Jun 15, 2022.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
microsoftsilverlight

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft silverlight5.0 and later · before 5.1.20913.0

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2016-0034Microsoft Silverlight 5 before 5.1.41212.0 mishandles negative offsets during decoding, which allows remote attackers to execute arbitrary cKEV
    86Now
  • CVE-2013-0074Microsoft Silverlight 5, and 5 Developer Runtime, before 5.1.20125.0 does not properly validate pointers during HTML object rendering, whichKEV
    85Now
  • CVE-2013-3178Microsoft Silverlight 5 before 5.1.20513.0 does not properly initialize arrays, which allows remote attackers to execute arbitrary code or c
    47Plan
  • CVE-2012-0176Double free vulnerability in Microsoft Silverlight 4 before 4.1.10329 on Windows allows remote attackers to execute arbitrary code via vecto
    44Plan
  • CVE-2015-6166Microsoft Silverlight 5 before 5.1.41105.00 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds re
    41Plan
  • CVE-2015-1715Microsoft Silverlight 5 before 5.1.40416.00 allows remote attackers to bypass intended integrity-level restrictions via a crafted Silverligh
    41Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrylocal2013-03-12
Metasploit moduleexploit/windows/browser/ms13_022_silverlight_script_objectMS13-022 Microsoft Silverlight ScriptObject Unsafe Memory Accessexploit2013-03-12

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-211 d
  2. Metasploit-211 d
  3. Published
  4. CISA KEV+3150 d
  5. TodayOct 1, 2026+4740 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records