How severe is CVE-2018-15704?

CVE-2018-15704 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-15704 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-15704?

CVE-2018-15704 affects Advantech Webaccess. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-15704?

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.

When was CVE-2018-15704 published?

CVE-2018-15704 was published on 2018-10-22 and last updated on 2026-06-17.

CVE-2018-15704

CVE-2018-15704 is a high-severity vulnerability in Advantech Webaccess with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 22% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Advantech Webaccess
Published: 2018-10-22
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2018-15704?: 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 severe is CVE-2018-15704?: CVE-2018-15704 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-15704 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-15704?: CVE-2018-15704 affects Advantech Webaccess. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-15704?: 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.
When was CVE-2018-15704 published?: CVE-2018-15704 was published on 2018-10-22 and last updated on 2026-06-17.

References

https://www.tenable.com/security/research/tra-2018-33

Affected products (1)

cpe:2.3:a:advantech:webaccess:*:*:*:*:*:*:*:*

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