NVD / CVE Program· CNA hackerone

CVE-2020-8196: Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and C

Noroxi assessment

Priority: Plan (action score 55/100)

CISA has confirmed exploitation in the wild (Nov 3, 2021). Remediation deadline for US federal agencies: May 3, 2022.
Probability of exploitation in the next 30 days: 26.3% (FIRST EPSS); higher than 98% of all records.
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Add it to your regular patch cycle. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 resulting in limited information disclosure to low privileged users.

MediumCVSS 4.3 · v3.1KEVWeaponized No fix recorded

Broken access control (IDOR)

BDU:2021-04813

Published: Jul 10, 2020
Updated: Jun 16, 2026
EPSS: 26.3% · 98th percentile
CWE: CWE-284

Report tools

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Action score

Plan

Add it to your regular patch cycle.

CVSS: 17 / 40 · 4.3 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 8 / 30 · 26.3%

CISA SSVC decision

Exploitation: active
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Nov 3, 2021. That signals real attacks, not theory.

Remediation deadline for US federal agencies: May 3, 2022.

Get told when this record changes

In CISA KEV: exploitation in the wild confirmed
Weaponized exploit exists
No fixed version yet

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
citrix	application delivery controller firmware	cpe:2.3:o:citrix:application_delivery_controller_firmware
citrix	netscaler gateway firmware	cpe:2.3:o:citrix:netscaler_gateway_firmware
citrix	gateway firmware	cpe:2.3:o:citrix:gateway_firmware
citrix	sd-wan wanop	cpe:2.3:o:citrix:sd-wan_wanop
citrix	4000-wo	cpe:2.3:h:citrix:4000-wo
citrix	4100-wo	cpe:2.3:h:citrix:4100-wo
citrix	5000-wo	cpe:2.3:h:citrix:5000-wo
citrix	5100-wo	cpe:2.3:h:citrix:5100-wo

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

citrix application delivery controller firmware10.5 and later · before 10.5-70.18
citrix application delivery controller firmware12.0 and later · before 12.0-63.21
citrix application delivery controller firmware12.1 and later · before 12.1-57.18
citrix application delivery controller firmware13.0 and later · before 13.0-58.30
citrix application delivery controller firmware11.1 and later · before 11.1-64.14
citrix gateway firmware13.0 and later · before 13.0-58.30
citrix netscaler gateway firmware11.1 and later · before 11.1-64.14
citrix netscaler gateway firmware10.5 and later · before 10.5-70.18
citrix netscaler gateway firmware12.0 and later · before 12.0-63.21
citrix netscaler gateway firmware12.1 and later · before 12.1-57.18
citrix sd-wan wanop10.2 and later · before 10.2.7
citrix sd-wan wanop11.0 and later · before 11.0.3d
citrix sd-wan wanop11.1 and later · before 11.1.1a

Versions reported by the vendor

Affected version ranges reported by the assigning authority (hackerone). Independent of NVD's CPE analysis and usually ahead of it.

n/a Citrix ADC, Citrix Gateway, Citrix SDWAN WAN-OP
- Citrix ADC and Citrix Gateway 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP 11.1.1a, 11.0.3d and 10.2.7affected

Same product

citrix: all records

Other highest-scoring records for the same primary product.

CVE-2019-19781An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0.KEV
99Now
CVE-2020-8193Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and CKEV
82Now
CVE-2022-27518Unauthenticated remote arbitrary code executionKEV
71This week

Published before and after this one in the same product

← EarlierCVE-2020-8194Jul 10, 2020 · Reflected code injection in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and
29Monitor
← EarlierCVE-2020-8195Jul 10, 2020 · Improper input validation in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 andKEV
66This week
Later →CVE-2020-8197Jul 10, 2020 · Privilege escalation vulnerability on Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-
36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

PublishedJul 10, 2020
CISA KEVNov 3, 2021+480 d
TodayNov 2, 2026+2306 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope