ManageEngine OpManager: XML Injection
CVE-2026-76979 is a high-severity XML injection vulnerability in ManageEngine OpManager from Zoho, with a CVSS 3.1 base score of 7.7 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists version 12.8.710 as the first without the flaw, so updating ManageEngine OpManager to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2.07% chance of exploitation within 30 days, higher than 82% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update ManageEngine OpManager to 12.8.710 or a later version.
- Update ManageEngine Firewall Analyzer to 12.8.710 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Zoho | ManageEngine OpManager | before 12.8.710 | 12.8.710 |
| Zoho | ManageEngine Firewall Analyzer | before 12.8.710 | 12.8.710 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N. Scored by CNA.
Official description
ZohoCorp ManageEngine OpManager and Firewall Analyzer versions 12.8.709 and below were vulnerable to an XML Injection vulnerability in the Rule Tracking Compare Policies feature.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: XML Injection
The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
References
Other references
Other vulnerabilities in ManageEngine OpManager
- 7.4 High severity
- 8.8 High severity
- 8.8 High severity
- 9.9 Critical severity
- 7.1 High severity
- 7.1 High severity
Recent XML Injection vulnerabilities
- 8.1 High severity
- 7.8 High severity
- 8.7 High severity
- 8.7 High severity
- 8.7 High severity
- 8.7 High severity
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