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Vulnerability record · CVE-2007-6721 · published 30 March 2009

CVE-2007-6721: Bouncycastle bc-java vulnerability

Bouncycastle · Bc Java

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."

10.0 CVSS 2.0 High EPSS 2.4% · top 16.5%
10.0CVSS 2.0 base score
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
14References
16 Jun 2026Last modified by NVD

Description

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."

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://freshmeat.net/projects/bouncycastlecryptoapi/releases/265580
http://www.bouncycastle.org/csharp/ PatchVendor Advisory
http://www.bouncycastle.org/devmailarchive/msg08195.html PatchVendor Advisory
http://www.bouncycastle.org/releasenotes.html
http://www.osvdb.org/50358
http://www.osvdb.org/50359
http://www.osvdb.org/50360
http://freshmeat.net/projects/bouncycastlecryptoapi/releases/265580
http://www.bouncycastle.org/csharp/ PatchVendor Advisory
http://www.bouncycastle.org/devmailarchive/msg08195.html PatchVendor Advisory
http://www.bouncycastle.org/releasenotes.html
http://www.osvdb.org/50358
http://www.osvdb.org/50359
http://www.osvdb.org/50360

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2007-6721), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.