CVE-2020-15522

mediumpriority · track · 25EPSS 0.015 · 74 %ileEUFRRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.52% (74th) EPSS

CVSS 4.3 · medium

Is it mine?

27 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 3.6

v3.15.9mediumAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.15.1mediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · OSV

v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-362USprimaryCWE-203USCWE-362USCWE-362US

affected products (27)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Elastic NV Elasticsearch≤ 8.7.1fstec_bduRU
Legion of the Bouncy Castle Inc. Bouncy Castle≤ 1.66fstec_bduRU
Legion of the Bouncy Castle Inc. Bouncy Castle Crypto Package For Java≤ 1.66fstec_bduRU
Legion of the Bouncy Castle Inc. Bouncy Castle Cryptography Library For .NET≤ 1.8.7fstec_bduRU
Legion of the Bouncy Castle Inc. Bouncy Castle FIPS .NET API (BC-FNA)≤ 1.0.1.1fstec_bduRU
Legion of the Bouncy Castle Inc. Bouncy Castle FIPS Java API (BC-FJA)≤ 1.0.2.1fstec_bduRU
NetApp Inc. Active IQ Unified Manager for Linux≤ 9.10fstec_bduRU
NetApp Inc. Active IQ Unified Manager for Microsoft Windows≤ 9.10fstec_bduRU
NetApp Inc. Active IQ Unified Manager for VMware vSphere≤ 9.10fstec_bduRU
NetApp Inc. Oncommand Insight≤ 7.3.12fstec_bduRU
NetApp Inc. SANtricity Storage Plugin for vCenter≤ 1.4fstec_bduRU
NetApp Inc. SnapCenter≤ 4.5fstec_bduRU
bouncycastle bc-csharp< 1.8.7nvdUScpe:2.3:a:bouncycastle:bc-csharp:*:*:*:*:*:*:*:*
bouncycastle bouncy castle fips .net api< 1.0.1.1nvdUScpe:2.3:a:bouncycastle:bouncy_castle_fips_.net_api:*:*:*:*:*:*:*:*
bouncycastle fips java api< 1.0.1.2nvdUScpe:2.3:a:bouncycastle:fips_java_api:*:*:*:*:*:*:*:*
bouncycastle fips java api1.0.2 → 1.0.2.1nvdUScpe:2.3:a:bouncycastle:fips_java_api:*:*:*:*:*:*:*:*
bouncycastle the bouncy castle crypto package for java< 1.66nvdUScpe:2.3:a:bouncycastle:the_bouncy_castle_crypto_package_for_java:*:*:*:*:*:*:*:*
Maven org.bouncycastle:bc-fips< 1.0.2.1osvUSpkg:maven/org.bouncycastle/bc-fips
Maven org.bouncycastle:bcprov-ext-jdk15on< 1.66osvUSpkg:maven/org.bouncycastle/bcprov-ext-jdk15on

showing 20 of 27

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-6xx3-rg99-gc3pTiming based private key exposure in Bouncy Castle2021-08-13ghsa · osvUS
Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.2.1, BC before 1.66, 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.
CERTFR-2026-AVI-1336Multiples vulnérabilités dans les produits IBMFrançais2026-10-16vendor · certfrFR

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv certfr NVD CVE.org MITRE

published 2021-05-20modified 2026-06-17

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+4134 more

references (24)

External citations — patches, advisories, analysis.

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