# CVE-2026-76978: Zoho ManageEngine OpManager and Firewall Analyzer command injection in Diagnose Settings

Source: https://junglewise.ai/threats/cve-2026-76978-zohocorp-manageengine-opmanager-and-firewall-analyzer-versions-12  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-23. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-76978 · Severity: high · CVSS 8.8 · Published 2026-09-23

ZohoCorp ManageEngine OpManager and Firewall Analyzer are network management tools used to monitor and control firewalls and network infrastructure. A command injection vulnerability in the Diagnose Settings feature allows low-privilege authenticated users to execute arbitrary commands on monitored firewalls, potentially enabling unauthorized access, data theft, or network compromise. The vulnerability affects versions 12.8.709 and earlier; Zoho has patched the issue by removing the vulnerable feature.

Technologies: [Zoho ManageEngine Firewall Analyzer](https://junglewise.ai/threats/technologies/manageengine-firewall-analyzer), [Zoho ManageEngine OpManager](https://junglewise.ai/threats/technologies/manageengine-opmanager), [Zoho ManageEngine OpManager Enterprise Edition](https://junglewise.ai/threats/technologies/manageengine-opmanager-enterprise-edition), [Zoho ManageEngine OpManager Nexus](https://junglewise.ai/threats/technologies/manageengine-opmanager-nexus), [Zoho ManageEngine OpManager Nexus Enterprise Edition](https://junglewise.ai/threats/technologies/manageengine-opmanager-nexus-enterprise-edition). Vendors: [Zoho](https://junglewise.ai/threats/vendors/zoho).

## Quick answers

**Is CVE-2026-76978 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76978 being exploited in the wild.

**How severe is CVE-2026-76978?** High severity, with a CVSS score of 8.8, published 23 September 2026.

**Which products and versions are affected?** Zoho ManageEngine Firewall Analyzer 12.8.709 and below; 12.8.718 to 12.9.122; Zoho ManageEngine OpManager 12.8.709 and below; Zoho ManageEngine OpManager Enterprise Edition 12.8.709 and below; Zoho ManageEngine OpManager Nexus 12.8.709 and below; and 1 more.

**Is there a fix for CVE-2026-76978?** A patch was published on 2026-08-14: OpManager and related products patched to versions 12.8.710 and above Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-76978 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-76978?** Check whether you run Zoho ManageEngine Firewall Analyzer, Zoho ManageEngine OpManager, Zoho ManageEngine OpManager Enterprise Edition or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A command injection flaw in the Diagnose Settings feature allows a low-privilege authenticated user to inject arbitrary CLI commands through a crafted request parameter, which are then executed on the monitored firewall using the product's stored credentials. The attack requires authentication to the management product itself. Zoho fixed this by removing the Diagnose Settings feature entirely from affected products.

## Affected products

- Zoho ManageEngine OpManager 12.8.709 and below
- Zoho ManageEngine OpManager Enterprise Edition 12.8.709 and below
- Zoho ManageEngine OpManager Nexus 12.8.709 and below
- Zoho ManageEngine OpManager Nexus Enterprise Edition 12.8.709 and below
- Zoho ManageEngine Firewall Analyzer 12.8.709 and below; 12.8.718 to 12.9.122

## Timeline

- 2026-09-23: disclosed
- 2026-08-14: patched: OpManager and related products patched to versions 12.8.710 and above
- 2026-08-20: patched: Firewall Analyzer patched to versions 12.9.124 and above

## References

- [https://www.manageengine.com/itom/advisory/cve-2026-76978.html](https://www.manageengine.com/itom/advisory/cve-2026-76978.html)

## Related threats

- [Zoho ManageEngine OpManager and Firewall Analyzer credential exposure in syslog collector](https://junglewise.ai/threats/cve-2026-76980-zohocorp-manageengine-opmanager-and-firewall-analyzer-versions-12)
- [Zoho ManageEngine OpManager and Firewall Analyzer XML injection in Rule Tracking](https://junglewise.ai/threats/cve-2026-76979-zohocorp-manageengine-opmanager-and-firewall-analyzer-versions-12)
- [Zoho ManageEngine OpManager and Firewall Analyzer access control bypass](https://junglewise.ai/threats/cve-2026-84791-zohocorp-manageengine-opmanager-and-firewall-analyzer-versions-12)
- [Zoho ManageEngine OpManager privilege escalation through Report Profile import](https://junglewise.ai/threats/cve-2026-84787-zohocorp-manageengine-opmanager-and-firewall-analyzer-versions-12)
- [ManageEngine OpManager path traversal in Smart Update Manager](https://junglewise.ai/threats/cve-2026-15358-zohocorp-manageengine-opmanager-and-network-configuration-manager)