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EST
PRE-CVE
emudhra · emsign ca

eMudhra emSign CA Certificate Private Key Compromise

60% confidence

Description

A security incident affecting eMudhra intermediate certificates has compromised the emSign root CA certificate. The incident involves weak elliptic curve private keys with extremely small values (d < 256), including at least one key with d=4, making the certificates unsuitable for trust. This requires immediate removal of the emSign root CA certificate from CA bundles to prevent man-in-the-middle (MITM) attacks against TLS clients.

Affected Products

VendorProductVersions
emudhraemsign ca—

Related News (1 articles)

Tier C
oss-security4h ago
Information for Python users regarding eMudhra / emSign CA certificate security incident
→ No new info (linked only)

Discussion (0)

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CISA KEV❌ No
Actively exploited❌ No
CWECWE-327, CWE-326
PublishedOct 22, 2026
Last enriched4h ago
Tags
certificate-compromiseweak-cryptographyca-certificateelliptic-curveprivate-key-compromisetls
Trending Score30
Source articles1
Independent1
Info Completeness7/14
Missing: cve_id, versions, cvss, epss, kev, patch, iocs

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Related CVEs (5)

CRITICALPRE-CVEEXP
eMudhra Intermediates Compromise
Trending: 39
CRITICALPRE-CVEEXP
eMudhra Intermediate Certificates Private Keys Compromise
Trending: 34
CRITICALPRE-CVEEXP
eMudhra Intermediate Certificate Private Keys Compromise
Trending: 34
HIGHPRE-CVE
eMudhra emSign Root CA Certificate Compromise
Trending: 27
CRITICALPRE-CVE
eMudhra P384 Intermediate Certificate Private Keys Weak Key Generation
Trending: 26

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Verification

State: reported
Confidence: 60%

Vulnerability Timeline

CVE Published
Oct 22, 2026
Exploit Available
Oct 22, 2026
Discovered by ZDM
Oct 22, 2026