How severe is CVE-2021-26699?

CVE-2021-26699 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability low.

Is CVE-2021-26699 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26699?

CVE-2021-26699 primarily affects Open-xchange Open-xchange Appsuite. In total, 56 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26699?

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

When was CVE-2021-26699 published?

CVE-2021-26699 was published on 2021-07-22 and last updated on 2026-06-17.

CVE-2021-26699

CVE-2021-26699 is a medium-severity vulnerability in Open-xchange Open-xchange Appsuite with a CVSS 3.x base score of 5.4. 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-918.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 5.8
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Open-xchange Open-xchange Appsuite
Published: 2021-07-22
Last modified: 2026-06-17

Description

OX App Suite before 7.10.3-rev4 and 7.10.4 before 7.10.4-rev4 allows SSRF via a shared SVG document that is mishandled by the imageconverter component when the .png extension is used.

Frequently asked questions

What is CVE-2021-26699?: OX App Suite before 7.10.3-rev4 and 7.10.4 before 7.10.4-rev4 allows SSRF via a shared SVG document that is mishandled by the imageconverter component when the .png extension is used.
How severe is CVE-2021-26699?: CVE-2021-26699 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability low.
Is CVE-2021-26699 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26699?: CVE-2021-26699 primarily affects Open-xchange Open-xchange Appsuite. In total, 56 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26699?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26699 published?: CVE-2021-26699 was published on 2021-07-22 and last updated on 2026-06-17.

References

Affected products (56)

cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:-:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:patch_release5547:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:patch_release5572:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:patch_release5623:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:patch_release5653:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:patch_release5677:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:patch_release5720:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev1:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev10:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev11:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev12:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev13:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev14:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev15:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev16:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev17:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev18:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev19:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev2:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev20:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev21:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev22:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev23:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev24:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev25:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev26:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev27:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev28:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev29:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev3:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev30:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev31:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev4:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev5:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev6:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev7:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev8:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.3:rev9:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.4:-:*:*:*:*:*:*
cpe:2.3:a:open-xchange:open-xchange_appsuite:7.10.4:rev1:*:*:*:*:*:*

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