CVE-2022-27516: citrix application_delivery_controller Protection Mechanism Failure
CVSS: 9.8v3.1CriticalModified
Published 08-11-2022Last modified 01-05-2025
Vulnerability summary
CVE-2022-27516 is a critical (CVSS 9.8) Protection Mechanism Failure vulnerability in citrix application_delivery_controller. EPSS estimates a 0.67% chance of exploitation in the next 30 days, higher than 50.8% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
0.67%
0%100%
Low · +0.03 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 08-11-2022PublishedVulnerability first disclosed.
- 01-05-2025Last modifiedVulnerability information updated.
Description
User login brute force protection functionality bypass
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources2 sources · 5.3–9.8
- CVE.orgCNA5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NDiffers
EPSS trend
Probability
0.67%
Chance of exploitation in the next 30 days
Percentile
51%
Versus all other CVEs
30-day change
+0.03 pp
From 0.64% on 18-09-2026
18-09-202618-10-2026
EPSS score0.67%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-693Protection Mechanism FailureThe product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
- CWE-307Improper Restriction of Excessive Authentication AttemptsThe product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
Affected systems
Citrix3 products
- application_delivery_controller≥ 12.1, < 12.1-65.21 | ≥ 13.0, < 13.0-88.12 | ≥ 13.1, < 13.1-33.47 | ≥ 12.1, < 12.1-55.289
- citrix gateway, citrix adcAll versions (No fix recorded)
- gateway≥ 12.1, < 12.1-65.21 | ≥ 13.0, < 13.0-88.12 | ≥ 13.1, < 13.1-33.47
1 vendor · 3 products
References
1 links- support.citrix.com/article/…Vendor Advisory