How severe is CVE-2020-9426?

CVE-2020-9426 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-9426 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9426?

CVE-2020-9426 affects Open-xchange Ox Guard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9426?

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

When was CVE-2020-9426 published?

CVE-2020-9426 was published on 2020-06-15 and last updated on 2026-06-17.

CVE-2020-9426

CVE-2020-9426 is a medium-severity vulnerability in Open-xchange Ox Guard with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Open-xchange Ox Guard
Published: 2020-06-15
Last modified: 2026-06-17

Description

OX Guard 2.10.3 and earlier allows XSS.

Frequently asked questions

What is CVE-2020-9426?: OX Guard 2.10.3 and earlier allows XSS.
How severe is CVE-2020-9426?: CVE-2020-9426 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-9426 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9426?: CVE-2020-9426 affects Open-xchange Ox Guard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9426?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-9426 published?: CVE-2020-9426 was published on 2020-06-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:open-xchange:ox_guard:2.10.3:*:*:*:*:*:*:*

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