CVE-2026-73576 Details
In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the OnlyOffice integration. The zimbraDocumentEditingJwtSecret is generated using an insecure random number generator, resulting in insufficient entropy. An attacker who obtains a JWT signed with the generated secret may be able to recover the JWT signing secret through offline brute-force, potentially enabling JWT forgery.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2026-73576
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.19 Probability of exploitation activity being observed over the next 30 days (9th percentile)
CVSS score for CVE-2026-73576
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
6.3 Medium
Products affected by CVE-2026-73576
Zimbra Collaboration Suite 8.6.0
Zimbra Collaboration Suite 8.7.11
Zimbra Collaboration Suite 8.8.10
Zimbra Collaboration Suite 8.8.11
Zimbra Collaboration Suite 8.8.12
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-73576 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
ID 348 10.92%
RU 278 8.72%
BR 208 6.52%
US 200 6.27%
VN 141 4.42%
IN 140 4.39%
FR 138 4.33%
DE 137 4.30%
BD 101 3.17%
TH 87 2.73%

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CVE-2026-73576 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Telecommunications 723 47.47%
Technology 636 41.76%
Government/Politics 55 3.61%
Business Services 22 1.44%
Education 20 1.31%
Transportation 13 0.85%
Finance 8 0.53%
Engineering 8 0.53%
Energy/Resources 7 0.46%
Consumer Goods 6 0.39%

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