# CVE-2026-12370: Zoho ManageEngine OpManager SSTI in Configlet processing

Source: https://junglewise.ai/threats/cve-2026-12370-zohocorp-manageengine-opmanager-netflow-analyzer-and-network  
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-2026-12370 · Severity: high · CVSS 7.6 · Published 2026-09-23

Zoho ManageEngine OpManager, NetFlow Analyzer, and Network Configuration Manager are network monitoring and management tools used by enterprises to oversee IT infrastructure. A server-side template injection flaw in Configlet processing allows unauthenticated attackers to achieve remote code execution on vulnerable systems, potentially compromising the entire managed network.

Technologies: [Zoho ManageEngine OpManager](https://junglewise.ai/threats/technologies/manageengine-opmanager). Vendors: [Zoho](https://junglewise.ai/threats/vendors/zoho).

## Quick answers

**Is CVE-2026-12370 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-12370 being exploited in the wild.

**How severe is CVE-2026-12370?** High severity, with a CVSS score of 7.6, published 23 September 2026.

**Which products and versions are affected?** Zoho ManageEngine NetFlow Analyzer 12.8.667 and below; Zoho ManageEngine Network Configuration Manager 12.8.667 and below; Zoho ManageEngine OpManager 12.8.667 and below.

**Is there a fix for CVE-2026-12370?** A patch was published on 2026-06-13: OpManager fix released (12.8.668) Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-12370 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-12370?** Check whether you run Zoho ManageEngine NetFlow Analyzer, Zoho ManageEngine Network Configuration Manager or Zoho ManageEngine OpManager 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 server-side template injection (SSTI) vulnerability exists in the Configlet processing component of OpManager, NetFlow Analyzer, and Network Configuration Manager versions 12.8.667 and below. The vulnerability allows remote code execution via template injection without requiring authentication. Patches are available in versions 12.8.668 and later.

## Affected products

- Zoho ManageEngine OpManager 12.8.667 and below
- Zoho ManageEngine NetFlow Analyzer 12.8.667 and below
- Zoho ManageEngine Network Configuration Manager 12.8.667 and below

## Timeline

- 2026-09-23: disclosed: CVE-2026-12370 published
- 2026-06-13: patched: OpManager fix released (12.8.668)
- 2026-06-19: patched: NetFlow Analyzer and Network Configuration Manager fixes released

## References

- [https://www.manageengine.com/itom/advisory/cve-2026-12370.html](https://www.manageengine.com/itom/advisory/cve-2026-12370.html)

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- [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)
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- [Zoho ManageEngine OpManager and Firewall Analyzer access control bypass](https://junglewise.ai/threats/cve-2026-84791-zohocorp-manageengine-opmanager-and-firewall-analyzer-versions-12)
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