CVE-2025-53645 json
Zimbra Collaboration (ZCS) before 9.0.0 Patch 46, 10.0.x before 10.0.15, and 10.1.x before 10.1.9 is vulnerable to a denial of service cond…
published 2025-07-09 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-20866
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 76%
- public exploits
- 0
- none known
Summary
Zimbra Collaboration (ZCS) before 9.0.0 Patch 46, 10.0.x before 10.0.15, and 10.1.x before 10.1.9 is vulnerable to a denial of service condition due to improper handling of excessive, comma-separated path segments in the Admin Console. An unauthenticated remote attacker can send specially crafted GET requests that trigger redundant processing and inflated responses. This leads to uncontrolled resource consumption, resulting in denial of service.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 16 mo ago
Exploit prediction
1.61% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
- wiki.zimbra.com /wiki/Zimbra_Security_Advisories
- wiki.zimbra.com /wiki/Security_Center
- wiki.zimbra.com /wiki/Zimbra_Responsible_Disclosure_Policy
- wiki.zimbra.com /wiki/Zimbra_Releases/10.1.9#Security_Fixes
- wiki.zimbra.com /wiki/Zimbra_Releases/10.0.15#Security_Fixes
- wiki.zimbra.com /wiki/Zimbra_Releases/9.0.0/P46#Security_Fixes
Sources
- CVE List CVE-2025-53645
- NVD CVE-2025-53645
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