THREATPORT/VULNERABILITY/CVE-2019-1126
MEDIUM SEVERITY

CVE-2019-1126

Windows Server 2012 vulnerability

CVSS
5.3
EPSS
4.9%
EPSS pct
91th
Exploited
No known
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.
Affected vendor
Microsoft
Affected product
Windows Server 2012
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness type (CWE)
  • CWE-307 — Improper Restriction of Excessive Authentication Attempts
Published
2019-07-15

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to low impact to confidentiality.

Its EPSS score of 4.9% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2019-1126

  • Confirm whether Microsoft Windows Server 2012 is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-1126.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-1126

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-1126 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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