Yes. CISA added CVE-2015-0310 to its Known Exploited Vulnerabilities catalogue on 25 May 2022, which it does only when there is reliable evidence of active exploitation. CISA has not linked it to known ransomware campaigns. Adobe Flash Player does not properly restrict discovery of memory addresses, which allows attackers to bypass the address space layout randomization (ASLR) protection mechanism.
Why This CVE Should Be Treated as an Active Exploitation Problem
CVE-2015-0310 is not just a historical browser-plugin flaw, it is an exploitation signal. Once a vulnerability reaches CISA’s KEV catalogue, the practical question is no longer whether the bug exists, but whether any internet-facing or legacy-dependent system still exposes the vulnerable component and whether an attacker can still reach it through an affected application path.
For legacy Adobe Flash exposure, the main operational issue is that the vulnerable component may persist inside packaged software, embedded enterprise workflows, or old endpoints even after organizations believe Flash has been removed. That is why actively exploited vulnerabilities often remain dangerous long after their original disclosure window.
What the ASLR Bypass Means for Exposure and Detection
This flaw weakens one of the defenses that normally raises the cost of exploitation. If an attacker can bypass address space layout randomization, follow-on exploitation becomes more reliable because memory layout guessing is no longer as hard. In practice, that can make chained exploitation easier when the vulnerable plugin is still reachable.
For defenders, the important point is that exploitation may not look unique at first glance. A bypass of a protection mechanism often shows up as part of a broader exploit chain, so you should look for Flash invocation in browsers, embedded renderers, or legacy application containers rather than only for a standalone signature tied to the CVE itself.
When you are checking exposure, the CISA Known Exploited Vulnerabilities Catalog tells you whether the issue is considered actively exploited, while vendor advisories and asset inventories tell you where the affected technology may still exist.
What to Do if You Still Find It
Use the CVE Program record and the vendor advisory to confirm the exact product scope, then remove, disable, or otherwise eliminate the vulnerable Flash dependency wherever it still exists. If remediation is blocked, treat the system as a high-risk exception and reduce exposure by isolating the asset, limiting user access, and restricting any path that can launch the plugin.
If patching or removal must wait, prioritize compensating controls that reduce exploitability, not just monitoring. That means shrinking the set of users and systems that can reach the vulnerable component, increasing logging around the affected application path, and accelerating replacement of any workflow that still depends on Flash content.
Because this is an exploited vulnerability, you should also check for signs that the system was accessed before remediation. For legacy endpoint or browser-plugin issues, compromise assessment matters because attackers often use the initial flaw to stage broader payload delivery or establish a foothold before defenders notice the plugin is present.
Use NVD for cross-checking record details, and use EPSS only as a prioritization aid, not as a substitute for KEV status. For a vulnerability already in KEV, confirmed exploitation should drive action ahead of abstract likelihood scoring.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
CIS Controls v8, NIST CSF 2.0 and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| CIS Controls v8 | CIS-7 — Continuous Vulnerability Management | Actively exploited vulnerabilities require prioritized scanning and remediation. |
| Recommendation — Prioritize, remediate, and verify exposed vulnerable assets on an accelerated cadence. | ||
| NIST CSF 2.0 | ID.RA-01 — Asset Vulnerabilities Are Identified and Documented | The answer depends on confirming where the vulnerable component still exists. |
| PR.IP-12 — Vulnerability Management | KEV-listed exploitation calls for accelerated remediation and exception handling. | |
| DE.CM-08 — Vulnerability Scans Are Performed | Exposure confirmation requires scanning and validation of legacy software paths. | |
| Recommendation — Inventory affected assets and document exposure before assigning remediation priority. Use a risk-based remediation workflow to remove or mitigate the exploited flaw fast. Scan for residual Flash dependencies and verify that removal is effective. | ||
| NIST SP 800-53 Rev 5 | RA-5 — Vulnerability Monitoring and Scanning | This CVE requires identifying and tracking vulnerable instances across the estate. |
| Recommendation — Monitor for affected installations and validate that remediation closed the exposure. | ||
Practitioner Guidance
What to verify: Confirm whether Flash is truly absent, or merely disabled in the browser while still reachable through an embedded application, kiosk image, or legacy desktop workflow. The distinction determines whether this is an eradication task or a containment task.
Decision rule: If the vulnerable component can still execute anywhere in the environment, prioritize removal and isolation before broader hardening work. If it cannot execute, focus on evidence collection and asset retirement so the exposure does not reappear through image reuse or unmanaged endpoints.
Practitioner takeaway: For a KEV-listed flaw, the operational question is not theoretical exploitability, it is whether any reachable instance still exists and whether you can prove it is gone.
Related resources from NHI Mgmt Group
- Guide: Zero-Day and Exploited Vulnerabilities Guide
- How do you patch or mitigate CVE-2015-0310 (Adobe Flash Player ASLR Bypass)?
- CVE-2015-0310 (Adobe Flash Player ASLR Bypass)
- Is CVE-2015-5122 (Adobe Flash Player Use-After-Free) being exploited in the wild?
- Is CVE-2015-3113 (Adobe Flash Player Heap-Based Buffer Overflow) being exploited in the wild?
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Reviewed and updated by the NHIMG editorial team on October 19, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org