Is CVE-2017-20228 actively exploited?

No active exploitation of CVE-2017-20228 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2017-20228 be exploited remotely?

No. CVE-2017-20228 requires local access to exploit.

What is the CVSS score of CVE-2017-20228?

CVE-2017-20228 has a CVSS score of 7.8 (HIGH).

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HIGH

CVE-2017-20228

CWE-787Published: March 28, 2026· Updated: Apr 2, 2026

7.8

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.0th

Official Description

Flat Assembler 1.71.21 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying oversized input to the application. Attackers can craft malicious assembly input exceeding 5895 bytes to overwrite the instruction pointer and execute return-oriented programming chains for shell command execution.

NVD Source

Technical Analysis

CVE-2017-20228 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.