# CVE-2026-21977: Information disclosure in Oracle Zero Data Loss Recovery Appliance Software

> An unauthenticated attacker can gain unauthorized read access to a subset of data in Oracle Zero Data Loss Recovery Appliance Software via network access.

- **Severity:** Low 3.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 20 Jan 2026
- **Updated:** 21 Jan 2026
- **Also known as:** GHSA-j6xw-536h-888x

## What is CVE-2026-21977?

CVE-2026-21977 is a low-severity vulnerability in Oracle Zero Data Loss Recovery Appliance Software, published on 20 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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).

## Which versions are affected by CVE-2026-21977?


## How do I fix CVE-2026-21977?

No fix has been published for CVE-2026-21977 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-21977 being exploited?

There is no known exploitation of CVE-2026-21977 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-21977 and fix it if it is affected.

What it is: CVE-2026-21977 is a low-severity vulnerability in Oracle Zero Data Loss Recovery Appliance Software, published on 20 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-21977 in the wild and no public exploit code.

Affected product: Oracle Zero Data Loss Recovery Appliance Software. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-21977/ (Markdown: https://insights.sbomify.com/CVE-2026-21977/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-21977
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-21977
- OSV: https://osv.dev/vulnerability/CVE-2026-21977

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-21977/
Summaries are generated and may contain mistakes; the official description above is the record.