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    CVE-2007-6721

    The Legion of the Bouncy Castle Java Cryptography API before release 1.38, as used in Crypto Provider Package before 1.36, has unknown impact and remote attack vectors related to "a Bleichenbacher vulnerability in simple RSA CMS signatures without signed attributes."

    Published:Nov 7, 2007
    Last Modified:Apr 23, 2026
    EPS:Mar 30, 2009
    EPSS Score:0.00856
    CVSS Score:10

    Affected Products

    Vendor
    Bouncycastle
    Product
    Bc-java
    Vendor
    Bouncycastle
    Product
    Bouncy-castle-crypto-package

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-12817 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, OpenPGP AEAD decryption skips final tag on chunk-aligned data. This iss…
    CVE-2026-12816 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via length-dependent KDF split. This …
    CVE-2026-12803 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce…
    CVE-2026-12802 (CVSS 8.7) — In Bouncy Castle for Java before 1.85, CMS AuthEnvelopedData fails to enforce tag-length on decryption. This i…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High