How severe is CVE-2026-21977?

CVE-2026-21977 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-21977 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-21977?

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

Does CVE-2026-21977 have an EU (EUVD) identifier?

Yes. CVE-2026-21977 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3535.

When was CVE-2026-21977 published?

CVE-2026-21977 was published on 2026-01-20 and last updated on 2026-06-17.

CVE-2026-21977

CVE-2026-21977 is a low-severity vulnerability with a CVSS 3.x base score of 3.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3535
Published: 2026-01-20
Last modified: 2026-06-17

Description

Vulnerability in the Oracle Zero Data Loss Recovery Appliance Software product of Oracle Zero Data Loss Recovery Appliance (component: Security). Supported versions that are affected are 23.1.0-23.1.202509. Difficult to exploit vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Oracle Zero Data Loss Recovery Appliance Software. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Zero Data Loss Recovery Appliance Software accessible data. CVSS 3.1 Base Score 3.1 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N).

Frequently asked questions

What is CVE-2026-21977?: Vulnerability in the Oracle Zero Data Loss Recovery Appliance Software product of Oracle Zero Data Loss Recovery Appliance (component: Security). Supported versions that are affected are 23.1.0-23.1.202509. Difficult to exploit vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Oracle Zero Data Loss Recovery Appliance Software. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Zero Data Loss Recovery Appliance Software accessible data. CVSS 3.1 Base Score 3.1 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N).
How severe is CVE-2026-21977?: CVE-2026-21977 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-21977 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-21977?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-21977 have an EU (EUVD) identifier?: Yes. CVE-2026-21977 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3535.
When was CVE-2026-21977 published?: CVE-2026-21977 was published on 2026-01-20 and last updated on 2026-06-17.

References

https://www.oracle.com/security-alerts/cpujan2026.html