● Covered by 1 source · 1 reportMedium impact1 negative
NIST Reports Compromised Intermediate Certificate Authority CVE-2026-111943
Key points
- CVE-2026-111943 reported by NIST.
- Intermediate Certificate Authority compromised.
- Attackers can forge certificates for any domain.
- Enables man-in-the-middle attacks.
Vulnerability Details
NIST has published details for CVE-2026-111943, which describes a critical security vulnerability stemming from the compromise of an intermediate Certificate Authority. This type of compromise is significant because intermediate CAs are trusted by root CAs to issue valid certificates.
Attack Capabilities
With a compromised intermediate CA, an attacker gains the ability to issue fraudulent digital certificates for any domain. These forged certificates would appear legitimate to web browsers and other systems that trust the compromised CA's chain, making it difficult for users to detect malicious activity.
Potential Impact
The primary risk associated with this vulnerability is the facilitation of man-in-the-middle (MITM) attacks. An attacker could intercept encrypted communications, impersonate legitimate websites, and potentially steal sensitive information without detection. The widespread trust placed in certificate authorities means such a compromise can have far-reaching implications for internet security.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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Primary sources
CVE CVE-2026-111943Reporting from
The National Institute of Standards and Technology (NIST) has reported CVE-2026-111943, indicating a compromised intermediate Certificate Authority (CA). This compromise allows an attacker to forge certificates for any domain, enabling man-in-the-middle attacks and potentially widespread impersonation.