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Fencer Vulns
medium 6.5

CVE-2020-8193 kev in the critical feed json

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…

published 2020-07-10 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29070

cvss
6.5
version 3.1, CNA
cisa kev
Exploited
added 2021-11-03
epss
88.3%
EPSS 88.3% chance of exploitation in 30 days, percentile 99.7%
public exploits
0
none known, plus a Nuclei check

Summary

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 allows unauthenticated access to certain URL endpoints.

Patch / fix

cisa required action Apply updates per vendor instructions.

  • citrix application_delivery_controller_firmware 10.5-70.18, 11.1-64.14, 12.0-63.21, 12.1-57.18, 13.0-58.30
  • citrix netscaler_gateway_firmware 10.5-70.18, 11.1-64.14, 12.0-63.21, 12.1-57.18
  • citrix gateway_firmware 13.0-58.30
  • citrix sd-wan_wanop 10.2.7, 11.0.3d, 11.1.1a

Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA patch deadline
  4. CISA SSVC: exploitation active

Known exploited

Added
5 y ago
Patch by
2022-05-03 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Citrix, Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance
CISA name
Citrix ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass Vulnerability

ATT&CK techniques

How it is exploited and what it leads to, in MITRE ATT&CK terms.

  • T1556 Modify Authentication Process exploitation
  • T1005 Data from Local System primary impact

kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

88.27% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Citrix - Local File Inclusion nuclei detection template
  • packetstormsecurity.com http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

  • n/a Citrix ADC, Citrix Gateway, Citrix SDWAN WAN-OP

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.