CVE-2026-73570
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
8.9
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
EPSS — probability of exploitation (30 days)
32.4%
98.3th percentile
CISA KEV
Listed
Added 2026-08-21 · patch by 2026-08-24
Weakness / dates
CWE-78
Published 2026-08-13 · modified 2026-08-24
CVSS breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
| Attack Vector | N | Network |
| Attack Complexity | H | High |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | C | Changed |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | L | Low |
Timeline
- 2026-08-13 — Published (NVD)
- 2026-08-21 — Added to CISA KEV (actively exploited)
- 2026-08-24 — CISA patch-by deadline
- 2026-08-24 — Last modified (NVD)
Description
A remote code execution vulnerability exists in Zimbra Collaboration (ZCS) before 10.1.20 when the optional zimbra-snmp package is installed and SNMP notifications are enabled. Due to improper sanitization of untrusted input during SNMP notification processing, an unauthenticated attacker can send specially crafted SMTP requests that may result in execution of arbitrary operating system commands as the Zimbra user.