CVE-2021-22919

mediumpriority · track · 30EPSS 0.009 · 61 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.94% (61st) EPSS

CVSS 5 · medium

Is it mine?

12 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-21

A vulnerability has been discovered in Citrix ADC (formerly known as NetScaler ADC) and Citrix Gateway (formerly known as NetScaler Gateway), and Citrix SD-WAN WANOP Edition models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities, if exploited, could lead to the limited available disk space on the appliances being fully consumed.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770USprimary

affected products (12)

Products and version ranges known to be affected.

n/a Citrix ADC, Citrix Gateway, Citrix SD-WAN WANOP≤ Citrix ADC and Citrix Gateway 13.0-82.45 and later releases of 13.0 Citrix ADC and Citrix Gateway 12.1-62.27 and later releases of 12.1 Citrix ADC and NetScaler Gateway 11.1-65.22 and later releases of 11.1 Citrix ADC 12.1-FIPS 12.1-55.247 and later releases of 12.1-FIPS Citrix SD-WAN WANOP Edition 11.4.0a and later releases of 11.4 Citrix SD-WAN WANOP Edition 11.3.2a and later releases of 11.3 Citrix SD-WAN WANOP Edition 11.2.3b and later releases of 11.2 Citrix SD-WAN WANOP Edition 10.2.9b and later releases of 10.2enisa_euvdEU
citrix application delivery controller firmware11.1 → 11.1-65.22nvdUScpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
citrix application delivery controller firmware12.1 → 12.1-55.238nvdUScpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
citrix application delivery controller firmware12.1 → 12.1-62.27nvdUScpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
citrix application delivery controller firmware13.0 → 13.0-82.45nvdUScpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
citrix gateway12.1 → 12.1-62.27nvdUScpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*
citrix gateway13.0 → 13.0-82.45nvdUScpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*
citrix netscaler gateway11.1 → 11.1-65.22nvdUScpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
citrix sd-wan wanop10.2 → 10.2.9.bnvdUScpe:2.3:o:citrix:sd-wan_wanop:*:*:*:*:*:*:*:*
citrix sd-wan wanop11.2 → 11.2.3.bnvdUScpe:2.3:o:citrix:sd-wan_wanop:*:*:*:*:*:*:*:*
citrix sd-wan wanop11.3 → 11.3.2.anvdUScpe:2.3:o:citrix:sd-wan_wanop:*:*:*:*:*:*:*:*
citrix sd-wan wanop11.4 → 11.4.0.anvdUScpe:2.3:o:citrix:sd-wan_wanop:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-08-05modified 2026-06-17

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references (4)

External citations — patches, advisories, analysis.

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