CVE-2021-27436

6.1 mediumEPSS 0.7%

Medium (6.1) in advantech webaccess\/scada. EPSS 0.7% chance of exploitation in the next 30 days.

WebAccess/SCADA Versions 9.0 and prior is vulnerable to cross-site scripting, which may allow an attacker to send malicious JavaScript code to an unsuspecting user, which could result in hijacking of the user’s cookie/session tokens, redirecting the user to a malicious webpage and performing unintended browser actions.

Severity

CVSS 3.1

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2021-03-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

advantech:webaccess\/scada

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-075-01
https://us-cert.cisa.gov/ics/advisories/icsa-21-075-01

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