How severe is CVE-2020-16971?

CVE-2020-16971 has a CVSS score of 7.4/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2020-16971?

CVE-2020-16971 affects the following packages: com.microsoft.azure:azure-eventhubs (Maven), com.azure:azure-core-amqp (Maven). Ecosystems affected: Maven.

How do I fix CVE-2020-16971?

Update com.microsoft.azure:azure-eventhubs to 3.2.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-16971 is resolved across your whole dependency graph.

How do I detect CVE-2020-16971 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.microsoft.azure:azure-eventhubs, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2020-16971 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2020-16971 actively exploited in the wild?

No public exploit code has been indexed for CVE-2020-16971 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2020-16971?

CVE-2020-16971 has an EPSS (Exploit Prediction Scoring System) score of 4.3%, placing it in the 91th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

When was CVE-2020-16971 published, and has it been updated?

CVE-2020-16971 was published on May 24, 2022 and was last updated on September 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

HIGH severity

CVE-2020-16971 — azure-eventhubs

HIGH

CVE-2020-16971 is a high-severity (CVSS 7.4) vulnerability in com.microsoft.azure:azure-eventhubs. A fix is available for com.microsoft.azure:azure-eventhubs — see the affected versions and patch details below.

Azure SDK for Java Security Feature Bypass Vulnerability

Published

May 24, 2022

Updated

Sep 10, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

4.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs91th percentile — riskier than 91% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected

☕com.microsoft.azure:azure-eventhubs☕com.azure:azure-core-amqp

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Azure SDK for Java Security Feature Bypass Vulnerability

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`com.microsoft.azure:azure-eventhubs`	all versions	3.2.1`com.microsoft.azure:azure-eventhubs:3.2.1`
☕Maven	`com.azure:azure-core-amqp`	all versions	1.6.0`com.azure:azure-core-amqp:1.6.0`

Affected Products

1 product · 1 configurations

Application

azure sdk for javamicrosoft

all

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.microsoft.azure:azure-eventhubs, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update com.microsoft.azure:azure-eventhubs to 3.2.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-16971 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Azure SDK for Java Security Feature Bypass Vulnerability

O3 Security · Impact-Aware SCA

Is CVE-2020-16971 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVE-2020-16971 — azure-eventhubs

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2020-16971 in your dependencies?