Microsoft Security
Snippet from the STRONTIUM ActionScript exploit code targeting CVE-2015-3043 in Adobe Flash…
3 passages name itOriginal (opens in a new tab) ↗
CVE-2015-3043 KEVPublic exploitEnd of life Critical · 9.8 EPSS 73.9%
Adobe Flash Player Memory Corruption Vulnerability
Adobe · Flash Player
End of lifeAdobe Flash Player reached End of lifeThe vendor no longer ships security fixes. Remove or isolate the product instead of waiting for a patch. on 31 Dec 2020. No patch is coming: remove or isolate it.
Summary
Adobe Flash Player contains a memory corruption flaw, classed as an out-of-bounds write, in its core player component. An attacker can run arbitrary code or crash the player over the network with no authentication or user interaction required, using unspecified attack vectors.
Official description · NVD
Adobe Flash Player before 13.0.0.281 and 14.x through 17.x before 17.0.0.169 on Windows and OS X and before 11.2.202.457 on Linux allows attackers to execute arbitrary code or cause a denial of service (memory corruption) via unspecified vectors, as exploited in the wild in April 2015, a different vulnerability than CVE-2015-0347, CVE-2015-0350, CVE-2015-0352, CVE-2015-0353, CVE-2015-0354, CVE-2015-0355, CVE-2015-0360, CVE-2015-3038, CVE-2015-3041, and CVE-2015-3042.
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
60.9 / 100
- Exploited
- Yes, in CISA KEV
- Reports
- 2
- Tactics
- 1/15
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 1 day before it was disclosed. Public exploit code (Metasploit) appeared 2 months after disclosure.
- First seen exploitedVulnCheck KEV evidence1 day before
- Disclosedday 0
- Public exploit codeMetasploit+2 mo
- Added to CISA KEVEU database agrees+7 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
1 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 1ImpactTA0040
Application or System Exploitation T1499.004
MITRE CTID mapping of the KEV entry · primary impact
This vulnerability is exploited by a maliciously-crafted .swf file which can be run on a user system.
Lower-confidence links (2)
These come from early or generic mappings, text matching, or contradict this CVE’s details (for example a public-facing technique on a bug that needs a user to open a file). Shown for completeness.
- Drive-by CompromiseT1189 server-side bug exploitable without user interaction; client-execution technique does not fit
- Malicious FileT1204.002 server-side bug exploitable without user interaction; client-execution technique does not fit
Detection
0 rules for this CVE · 3 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-2015-3043 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.
Application or System ExploitationT1499.0043 general rules
- Audit CVE Eventcriticaltest
- Apache Segmentation Faulthightest
- Nginx Core Dumphightest
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
What security researchers reported
Named in 2 threat reports2 reportsMicrosoftservices.google.com
Reports are matched by finding the exact id CVE-2015-3043 in their text; nobody has reviewed the match. One passage is shown per report, at most 320 characters, linked to the original.
The Overlooked North Korean Actor
Mentions the CVE; no further detail.
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.
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- 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