PatchTheCVECVE-2018-15704: Advantech WebAccess 8.3.2 and below is vulnerable to a stack buffer overflow vulnerability
CVE-2018-15704 is a high-severity flaw (CVSS 8.8) affecting webaccess. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Advantech WebAccess 8.3.2 and below is vulnerable to a stack buffer overflow vulnerability. A remote authenticated attacker could potentially exploit this vulnerability by sending a crafted HTTP request to broadweb/system/opcImg.asp.
Why this priority
- High severity
- EPSS top 2%: very likely to be exploited
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 21.5% (top 2%) |
| CISA exploited list | No |
| Weakness | CWE-787 |
| Published | 2018-10-22 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2018-15704?
webaccess: upgrade to newer than 8.3.2. Exact commands for each OS are on this page.
Is CVE-2018-15704 being exploited?
CVE-2018-15704 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2018-15704 affect?
CVE-2018-15704 affects webaccess. Severity is high (CVSS 8.8). Advantech WebAccess 8.3.2 and below is vulnerable to a stack buffer overflow vulnerability. A remote authenticated attacker could potentially exploit this vulnerability by sending a crafted HTTP request to broadweb/system/opcImg.asp.
How urgent is CVE-2018-15704?
Priority 60/100. High severity; EPSS top 2%: very likely to be exploited; Public exploit reference
Software pages
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