Medium severity · published Jun 16, 2021
CVE-2020-8299
Citrix ADC and Citrix/NetScaler Gateway 13.0 before 13.0-76.29, 12.1-61.18, 11.1-65.20, Citrix ADC 12.1-FIPS before 12.1-55.238, and Citrix SD-WAN WANOP Edition before 11.4.0,…
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
Citrix ADC and Citrix/NetScaler Gateway 13.0 before 13.0-76.29, 12.1-61.18, 11.1-65.20, Citrix ADC 12.1-FIPS before 12.1-55.238, and Citrix SD-WAN WANOP Edition before 11.4.0, 11.3.2, 11.3.1a, 11.2.3a, 11.1.2c, 10.2.9a suffers from uncontrolled resource consumption by way of a network-based denial-of-service from within the same Layer 2 network segment. Note that the attacker must be in the same Layer 2 network segment as the vulnerable appliance.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NA
NetScaler ADC · Citrix
12.1 before 12.1-61.18; 13.0 before 13.0-76.29 · source: NVD
AD
Application Delivery Controller Firmware · Citrix
11.1 before 11.1-65.20; 12.1 before 12.1-61.18; 13.0 before 13.0-76.29; 12.1 before 12.1-55.238 · source: NVD
SW
Sd-wan Wanop · Citrix
10.2 before 10.2.9a; 11.1 before 11.1.2c; 11.2 before 11.2.3a; 11.3 before 11.3.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8299
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-8299
Vendor Advisory
https://support.citrix.com/article/CTX297155
More from NetScaler ADC
9.8
CVE-2026-88771
A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands
9.8
CVE-2026-19490
NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-19490
9.8
CVE-2026-8452
Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service
9.8
CVE-2026-3055
Insufficient input validation leading to memory overread
9.8
CVE-2025-7775
Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service