CVE-2026-76980: Zoho ManageEngine OpManager and Firewall Analyzer credential exposure in syslog collector

CVE-2026-76980 · Severity: high · CVSS 7.4 · Published 2026-09-23

Zoho ManageEngine OpManager and Firewall Analyzer are network monitoring and firewall management tools used by IT teams to oversee network infrastructure. A flaw in the syslog collector allows an attacker on the network to redirect credential-protected connections to a malicious server, stealing stored firewall access credentials. An attacker can exploit this with simple UDP network traffic, potentially gaining access to managed firewalls.

Technologies: Zoho ManageEngine Firewall Analyzer, Zoho ManageEngine OpManager, Zoho ManageEngine OpManager Enterprise Edition, Zoho ManageEngine OpManager Nexus, Zoho ManageEngine OpManager Nexus Enterprise Edition. Vendors: Zoho.

Quick answers

Is CVE-2026-76980 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-76980 being exploited in the wild.
How severe is CVE-2026-76980?
High severity, with a CVSS score of 7.4, 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-2026-76980?
A patch was published on 2026-08-14: OpManager versions 12.8.710 and above patched Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-76980 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-76980?
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

The Firewall Analyzer syslog collector incorrectly trusts the source host information in incoming UDP syslog datagrams to determine the target IP for CLI configuration sessions, allowing an attacker to redirect authenticated connections to an attacker-controlled host. The vulnerability affects versions 12.8.709 and below, and can be exploited by any network-adjacent attacker capable of sending UDP traffic to the syslog listener port. The fix switches the product to use the originally configured device IP address instead of the syslog source host.

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: Vulnerability disclosed by vendor
  • 2026-08-14: patched: OpManager versions 12.8.710 and above patched
  • 2026-08-20: patched: Firewall Analyzer versions 12.9.124 and above patched

References

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