Microsoft Security
It is known to target a number of vulnerabilities in Silverlight (CVE- 2013-0074), Internet Explorer (CVE-2013-2551), Adobe Flash…
2 passages name itOriginal (opens in a new tab) ↗
CVE-2013-0074 KEVRansomwarePublic exploitEnd of life High · 7.8 EPSS 78.9%
Microsoft Silverlight Double Dereference Vulnerability
Microsoft · Silverlight
End of lifeMicrosoft Silverlight reached End of lifeThe vendor no longer ships security fixes. Remove or isolate the product instead of waiting for a patch. on 12 Oct 2021. No patch is coming: remove or isolate it.
Summary
The flaw is an improper pointer validation during HTML object rendering in Microsoft Silverlight 5 and Silverlight 5 Developer Runtime, affecting builds before 5.1.20125.0. An attacker can execute arbitrary code by delivering a crafted Silverlight application to the target, which requires that the victim be induced to open or run that application and no prior authentication is needed.
Official description · NVD
Microsoft Silverlight 5, and 5 Developer Runtime, before 5.1.20125.0 does not properly validate pointers during HTML object rendering, which allows remote attackers to execute arbitrary code via a crafted Silverlight application, aka "Silverlight Double Dereference Vulnerability."
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
69.5 / 100
- Exploited
- Yes, in CISA KEV
- Reports
- 2
- Tactics
- 2/15
How an attack unfolds
Based on MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. mappings. Select a step to see the evidence.Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 15 months after disclosure. Public exploit code (Exploit-DB) was available 1 day before disclosure.
- Public exploit codeExploit-DB1 day before
- Disclosedday 0
- First seen exploitedVulnCheck KEV evidence+15 mo
- Added to CISA KEVknown ransomware use; EU database agrees+9 yrs
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
2 TechniqueOne specific attacker behaviour in MITRE ATT&CK, such as T1190 “Exploit Public-Facing Application”. IDs with a dot, like T1059.004, are sub-techniques., grouped by TacticThe attacker’s goal at a stage of an attack in MITRE ATT&CK, such as Initial Access or Persistence. Each technique belongs to one or more tactics. in kill-chain order, 2 cited passages 2Initial AccessTA0001
Drive-by Compromise T1189 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
AI mapping from the description · how it is exploited
Malicious Silverlight content delivered to victim's browser
allows remote attackers to execute arbitrary code via a crafted Silverlight application
ExecutionTA0002
Command and Scripting Interpreter T1059 Medium Confidence (technique links)How sure Patchfirst is that an ATT&CK technique applies to this CVE. High and medium links are shown by default; low ones come from early or generic mappings, text matching, or contradict the CVE’s details.
AI mapping from the description · primary impact
Arbitrary code execution is the direct impact
allows remote attackers to execute arbitrary code
Detection
0 rules for this CVE · 98 general rules for its techniquesRules for this CVE
0Sigma ruleAn open, vendor-neutral detection rule for log data. Security teams convert Sigma rules into searches for their own SIEM. that reference CVE-2013-0074 directly.CVE-specific rules are not available in this build. Search SigmaHQ ↗
General rules for this CVE’s techniques
These detect the technique in general, not this specific vulnerability.
Drive-by CompromiseT11893 general rules
Command and Scripting InterpreterT105995 general rules
- HackTool - Sliver C2 Implant Activity Patterncriticaltest
- Lazarus Group Activitycriticaltest
- REvil Kaseya Incident Malware Patternscriticaltest
- Turla Group Lateral Movementcriticaltest
- Windows Defender AMSI Trigger Detectedhighstable
- Windows Defender Threat Detectedhighstable
- Abusable DLL Potential Sideloading From Suspicious Locationhightest
- Add Insecure Download Source To Wingethightest
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
What security researchers reported
Named in 2 threat reports2 reportsMicrosoft2
Reports are matched by finding the exact id CVE-2013-0074 in their text; nobody has reviewed the match. One passage is shown per report, at most 320 characters, linked to the original.
Microsoft Security
Mentions the CVE; no further detail.
3 passages name itOriginal (opens in a new tab) ↗
Also mentioned in 50 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Actively_Exploited_Kev | Oct 29, 202628 Oct 2026
- Actively_Exploited_Kev | Oct 28, 202627 Oct 2026
- Actively_Exploited_Kev | Oct 27, 202626 Oct 2026
- Actively_Exploited_Kev | Oct 24, 202623 Oct 2026
- Actively_Exploited_Kev | Oct 23, 202622 Oct 2026
- Actively_Exploited_Kev | Oct 22, 202621 Oct 2026
- 44 more on OTX