CVE-2020-15522Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.1.2, 1.0.2.1, and BC-FNA before 1.0.1.1 have a timing issue…
- 5.9MediumCVSS base score
- 1.5%Exploitation in 30 daysEPSS · top 25% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.1.2, 1.0.2.1, and BC-FNA before 1.0.1.1 have a timing issue within the EC math library that can expose information about the private key when an attacker is able to observe timing information for the generation of multiple deterministic ECDSA signatures.
Timeline
ID reserved
By mitre
- 11 months later
· 11 months later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.5% · top 25% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Affected products
n/a
- affected n/a
Affected packages
Affected packages9
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.bouncycastle:bc-fipsGHSA-6xx3-rg99-gc3p (opens in a new tab)
- Mavenorg.bouncycastle:bcprov-ext-jdk15onGHSA-6xx3-rg99-gc3p (opens in a new tab)
- Mavenorg.bouncycastle:bcprov-ext-jdk16GHSA-6xx3-rg99-gc3p (opens in a new tab)
- Mavenorg.bouncycastle:bcprov-jdk14GHSA-6xx3-rg99-gc3p (opens in a new tab)
- Mavenorg.bouncycastle:bcprov-jdk15GHSA-6xx3-rg99-gc3p (opens in a new tab)
- Mavenorg.bouncycastle:bcprov-jdk15onGHSA-6xx3-rg99-gc3p (opens in a new tab)
- Mavenorg.bouncycastle:bcprov-jdk15to18GHSA-6xx3-rg99-gc3p (opens in a new tab)
- Mavenorg.bouncycastle:bcprov-jdk16GHSA-6xx3-rg99-gc3p (opens in a new tab)
- NuGetBouncyCastleGHSA-6xx3-rg99-gc3p (opens in a new tab)
References
References4
- https://www.bouncycastle.org/releasenotes.html (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/bcgit/bc-java/wiki/CVE-2020-15522 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/bcgit/bc-csharp/wiki/CVE-2020-15522 (opens in a new tab)x_refsource_MISCx_transferred
- https://security.netapp.com/advisory/ntap-20210622-0007/ (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-1608 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-6xx3-rg99-gc3p (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-15522)Record last updated .