CVE-2021-22656
CVE-2021-22656 is a high-severity vulnerability in Advantech Iview with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 3% (86th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-22
- Affected product: Advantech Iview
- Published:
- Last modified:
Description
Advantech iView versions prior to v5.7.03.6112 are vulnerable to directory traversal, which may allow an attacker to read sensitive files.
Frequently asked questions
- What is CVE-2021-22656?
- Advantech iView versions prior to v5.7.03.6112 are vulnerable to directory traversal, which may allow an attacker to read sensitive files.
- How severe is CVE-2021-22656?
- CVE-2021-22656 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2021-22656 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-22656?
- CVE-2021-22656 affects Advantech Iview. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-22656?
- 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-2021-22656 published?
- CVE-2021-22656 was published on 2021-02-11 and last updated on 2026-06-17.
References
- https://us-cert.cisa.gov/ics/advisories/icsa-21-040-02
- https://www.zerodayinitiative.com/advisories/ZDI-21-189/
Affected products (1)
- cpe:2.3:a:advantech:iview:*:*:*:*:*:*:*:*
More vulnerabilities in Advantech Iview
- CVE-2022-50593 — Critical (CVSS 9.8): Advantech iView versions prior to v5.7.04 build 6425 contain a vulnerability within the SNMP management tool that…
- CVE-2022-50591 — Critical (CVSS 9.8): Advantech iView versions prior to v5.7.04 build 6425 contain a vulnerability within the SNMP management tool that…
- CVE-2022-2143 — Critical (CVSS 9.8): The affected product is vulnerable to two instances of command injection, which may allow an attacker to remotely…
- CVE-2021-32930 — Critical (CVSS 9.8): The affected product’s configuration is vulnerable due to missing authentication, which may allow an attacker to…
- CVE-2021-22658 — Critical (CVSS 9.8): Advantech iView versions prior to v5.7.03.6112 are vulnerable to a SQL injection, which may allow an attacker to…
- CVE-2021-22652 — Critical (CVSS 9.8): Access to the Advantech iView versions prior to v5.7.03.6112 configuration are missing authentication, which may allow…
All CVEs affecting Advantech Iview →
Other CWE-22 (Path Traversal) vulnerabilities
- CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
- CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
- CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
- CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
- CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
- CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…