GENERAL/ MISCELLANEOUS CIRCULARS

Cyber Threat Advisory on Compromised eMudhra CA Keys by Data Security Council of India

By TEAM CIRCULAR EXPRESS • 23 Oct 2026
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• DSCI has issued a threat advisory regarding the compromise of eight eMudhra intermediate CA certificates.
• The private keys were found to be weak and easily recoverable, posing risks of forged certificates.
• Users must update browsers and operating systems immediately.
• IT teams should patch trust stores, rebuild container images, and migrate affected emSign certificates to the RSA G1 chain to ensure security.
purpose of issuance
To provide guidance and recommended actions for the Indian industry following the compromise of eMudhra intermediate CA certificates.
Most Important Details
Eight intermediate CA keys (six TLS, two code-signing) were generated with low entropy, allowing for easy recovery. This affects 16 certificates including Sectigo cross-signs. Organizations must update CA bundles, runtimes, and migrate certificates from the ECC G3 chain to the RSA G1 chain.
issuing authority
Data Security Council of India (DSCI)
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