CVE-2021-22920

mediumpriority · track · 26EPSS 0.009 · 60 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.92% (60th) EPSS

CVSS 4.3 · medium

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-26

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 a phishing attack through a SAML authentication hijack to steal a valid user session.

cvss

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

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284US

affected products (6)

Products and version ranges known to be affected.

n/a Citrix ADC, Citrix Gateway≤ Citrix ADC and Citrix Gateway 12.1-62.27 and later releases of 12.1enisa_euvdEU
n/a Citrix ADC, Citrix Gateway≤ Citrix ADC and Citrix Gateway 13.0-82.45 and later releases of 13.0enisa_euvdEU
citrix application delivery management= 12.1-62.25nvdUScpe:2.3:a:citrix:application_delivery_management:*:*:*:*:*:*:*:*
citrix application delivery management= 13.0-82.42nvdUScpe:2.3:a:citrix:application_delivery_management:*:*:*:*:*:*:*:*
citrix gateway= 12.1-62.25nvdUScpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*
citrix gateway= 13.0-82.42nvdUScpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*

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

references (4)

External citations — patches, advisories, analysis.

scry

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