CVE-2017-20226
CVE-2017-20226 is a high-severity vulnerability with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 8.4)
- CVSS v4: 8.6
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2017-18945
- Weakness: CWE-787
- Published:
- Last modified:
Description
Mapscrn 2.0.3 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized input buffer. Attackers can craft a malicious buffer with junk data, return address, NOP instructions, and shellcode to overflow the stack and achieve code execution or denial of service.
Frequently asked questions
- What is CVE-2017-20226?
- Mapscrn 2.0.3 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized input buffer. Attackers can craft a malicious buffer with junk data, return address, NOP instructions, and shellcode to overflow the stack and achieve code execution or denial of service.
- How severe is CVE-2017-20226?
- CVE-2017-20226 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2017-20226 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2017-20226?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2017-20226 have an EU (EUVD) identifier?
- Yes. CVE-2017-20226 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-18945.
- When was CVE-2017-20226 published?
- CVE-2017-20226 was published on 2026-03-28 and last updated on 2026-06-17.
References
- http://ccross.msk.su
- https://www.exploit-db.com/exploits/42144
- https://www.vulncheck.com/advisories/mapscrn-stack-based-buffer-overflow
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