How severe is CVE-2021-22674?

CVE-2021-22674 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-22674 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22674?

CVE-2021-22674 affects Advantech Webaccess/scada. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22674?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-22674 published?

CVE-2021-22674 was published on 2021-08-10 and last updated on 2026-06-17.

CVE-2021-22674

CVE-2021-22674 is a medium-severity vulnerability in Advantech Webaccess/scada with a CVSS 3.x base score of 6.5. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Advantech Webaccess/scada
Published: 2021-08-10
Last modified: 2026-06-17

Description

The affected product is vulnerable to a relative path traversal condition, which may allow an attacker access to unauthorized files and directories on the WebAccess/SCADA (WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1).

Frequently asked questions

What is CVE-2021-22674?: The affected product is vulnerable to a relative path traversal condition, which may allow an attacker access to unauthorized files and directories on the WebAccess/SCADA (WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1).
How severe is CVE-2021-22674?: CVE-2021-22674 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-22674 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22674?: CVE-2021-22674 affects Advantech Webaccess/scada. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22674?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22674 published?: CVE-2021-22674 was published on 2021-08-10 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-217-04

Affected products (1)

cpe:2.3:a:advantech:webaccess\/scada:*:*:*:*:*:*:*:*

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