How severe is CVE-2021-42537?

CVE-2021-42537 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2021-42537 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42537?

CVE-2021-42537 affects Visam Vbase Web-remote. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42537?

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

When was CVE-2021-42537 published?

CVE-2021-42537 was published on 2022-07-27 and last updated on 2026-06-17.

CVE-2021-42537

CVE-2021-42537 is a medium-severity vulnerability in Visam Vbase Web-remote with a CVSS 3.x base score of 5.9. 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-611.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Visam Vbase Web-remote
Published: 2022-07-27
Last modified: 2026-06-17

Description

VISAM VBASE version 11.6.0.6 processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

Frequently asked questions

What is CVE-2021-42537?: VISAM VBASE version 11.6.0.6 processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
How severe is CVE-2021-42537?: CVE-2021-42537 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2021-42537 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42537?: CVE-2021-42537 affects Visam Vbase Web-remote. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42537?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-42537 published?: CVE-2021-42537 was published on 2022-07-27 and last updated on 2026-06-17.

References

https://www.cisa.gov/uscert/ics/advisories/icsa-21-308-01

Affected products (1)

cpe:2.3:a:visam:vbase_web-remote:11.6.0.6:*:*:*:*:*:*:*

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CVE-2020-10601 — High (CVSS 7.8): VISAM VBASE Editor version 11.5.0.2 and VBASE Web-Remote Module allow weak hashing algorithm and insecure permissions…
CVE-2020-7008 — High (CVSS 7.5): VISAM VBASE Editor version 11.5.0.2 and VBASE Web-Remote Module may allow input passed in the URL that is not properly…
CVE-2020-7000 — High (CVSS 7.5): VISAM VBASE Editor version 11.5.0.2 and VBASE Web-Remote Module may allow an unauthenticated attacker to discover the…
CVE-2021-38417 — High (CVSS 7.4): VISAM VBASE version 11.6.0.6 is vulnerable to improper access control via the web-remote endpoint, which may allow an…

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Other CWE-611 (Improper Restriction of XML External Entity Reference (XXE)) vulnerabilities

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CVE-2015-9280 — Critical (CVSS 10.0): MailEnable before 8.60 allows XXE via an XML document in the request.aspx Options parameter.
CVE-2018-1000838 — Critical (CVSS 10.0): autopsy version <= 4.9.0 contains a XML External Entity (XXE) vulnerability in CaseMetadata XML Parser that can result…
CVE-2018-1000837 — Critical (CVSS 10.0): UML Designer version <= 8.0.0 contains a XML External Entity (XXE) vulnerability in XML parser for plugins that can…
CVE-2018-1000835 — Critical (CVSS 10.0): KeePassDX version <= 2.5.0.0beta17 contains a XML External Entity (XXE) vulnerability in kdbx file parser that can…

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