How severe is CVE-2022-36021?

CVE-2022-36021 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-36021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 60% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-36021?

CVE-2022-36021 affects Redis. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-36021?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-36021 published?

CVE-2022-36021 was published on 2023-03-01 and last updated on 2026-06-17.

CVE-2022-36021

CVE-2022-36021 is a medium-severity vulnerability in Redis with a CVSS 3.x base score of 5.5. Its EPSS exploit-prediction score of 60% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-407.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 60% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-407
Affected product: Redis
Published: 2023-03-01
Last modified: 2026-06-17

Description

Redis is an in-memory database that persists on disk. Authenticated users can use string matching commands (like `SCAN` or `KEYS`) with a specially crafted pattern to trigger a denial-of-service attack on Redis, causing it to hang and consume 100% CPU time. The problem is fixed in Redis versions 6.0.18, 6.2.11, 7.0.9.

Frequently asked questions

What is CVE-2022-36021?: Redis is an in-memory database that persists on disk. Authenticated users can use string matching commands (like `SCAN` or `KEYS`) with a specially crafted pattern to trigger a denial-of-service attack on Redis, causing it to hang and consume 100% CPU time. The problem is fixed in Redis versions 6.0.18, 6.2.11, 7.0.9.
How severe is CVE-2022-36021?: CVE-2022-36021 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-36021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 60% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-36021?: CVE-2022-36021 affects Redis. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-36021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-36021 published?: CVE-2022-36021 was published on 2023-03-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*

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