Vulnerability in Microsoft Windows Server
CVE-2019-1126
A security feature bypass vulnerability exists in Active Directory Federation Services (ADFS) which could allow an attacker to bypass the extranet lockout policy.To exploit this vulnerability, an attacker could run a specially crafted application, which would allow an attacker to launch a password brute-force attack or cause account lockouts in Active Directory.This security update corrects how ADFS handles external authentication requests., aka 'ADFS Security Feature Bypass Vulnerability'. This CVE ID is unique from CVE-2019-0975.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.049 (91.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.049 · newest: 0.049 · change: 0.000
Affected products
- Microsoft Windows Server — versions 2012 R2, 2012 R2 (Core installation), 2016
- Microsoft Windows Server 2012 — versions r2
- Microsoft Windows Server 2016 — versions 1803, 1903
- Microsoft Windows Server 2019
- Microsoft Windows Server, Version 1903 (Server Core Installation) — versions unspecified
Weakness classification (CWE)
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1126 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2019-1126?
- CVE-2019-1126 is a medium-severity vulnerability in Microsoft Windows Server, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 5.3/10. Published 2019-07-15.
- How severe is CVE-2019-1126?
- Medium severity. CVSS v3 base score is 5.3 out of 10.