How severe is CVE-2021-28093?

CVE-2021-28093 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-28093 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-2021-28093?

CVE-2021-28093 primarily affects Open-xchange Open-xchange Documents. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-28093?

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

When was CVE-2021-28093 published?

CVE-2021-28093 was published on 2021-07-30 and last updated on 2026-06-17.

CVE-2021-28093

CVE-2021-28093 is a medium-severity vulnerability in Open-xchange Open-xchange Documents 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-326.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.4
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-326
Affected product: Open-xchange Open-xchange Documents
Published: 2021-07-30
Last modified: 2026-06-17

Description

OX Documents before 7.10.5-rev5 has Incorrect Access Control of converted images because hash collisions can occur, due to use of Adler32.

Frequently asked questions

What is CVE-2021-28093?: OX Documents before 7.10.5-rev5 has Incorrect Access Control of converted images because hash collisions can occur, due to use of Adler32.
How severe is CVE-2021-28093?: CVE-2021-28093 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-28093 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-2021-28093?: CVE-2021-28093 primarily affects Open-xchange Open-xchange Documents. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-28093?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28093 published?: CVE-2021-28093 was published on 2021-07-30 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:open-xchange:open-xchange_documents:*:*:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_documents:7.10.5:-:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_documents:7.10.5:revision1:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_documents:7.10.5:revision2:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_documents:7.10.5:revision3:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_documents:7.10.5:revision4:*:*:*:*:*:*

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