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Attackers Exploit Zimbra SNMP Flaw for Unauthenticated Remote Code Execution

BACKGROUND
1 SIGNALFIRST DETECTED 20 August 2026
Narrative synthesis pending — 1 signal collected.
How the story developed
Other feeds and industry voices
21 Jul
Zimbra Patches Critical SNMP Command Injection and Four XSS Vulnerabilities

Zimbra has rolled out fixes to address multiple critical security issues, including a command injection flaw in the Simple Network Management Protocol (SNMP) monitoring component.

REPORT · WHEN · The Hacker NewsOPEN STORY
24 Apr
Over 10,000 Zimbra servers vulnerable to ongoing XSS attacks

Over 10,000 Zimbra Collaboration Suite (ZCS) instances exposed online are vulnerable to ongoing attacks exploiting a cross-site scripting (XSS) security flaw. [...]

REPORT · WHAT · BleepingComputerOPEN STORY
11 Jul
Critical Zimbra Flaw Could Let Crafted Emails Run Malicious Code in User Sessions

Zimbra is urging customers to apply updates to address a critical security vulnerability impacting the Classic Web Client that could result in arbitrary code execution. The

REPORT · WHAT · The Hacker NewsOPEN STORY
29 Jul
Russian hackers exploit Exchange OWA zero-day for long-term mailbox access

The Russian state-sponsored hacking group Laundry Bear, also known as Void Blizzard, is exploiting an Exchange Outlook Web Access vulnerability in email campaigns to deliver a

REPORT · HOW · BleepingComputerOPEN STORY
14 May
Cisco warns of new critical SD-WAN flaw exploited in zero-day attacks

Cisco is warning that a critical Catalyst SD-WAN Controller authentication bypass flaw, tracked as CVE-2026-20182, was actively exploited in zero-day attacks that allowed

REPORT · WHAT · BleepingComputerOPEN STORY
24 Jun
Cisco Unified CM Flaw Exploited After PoC Reveals File-Write Path to Root

Threat actors have begun to exploit a recently disclosed critical security flaw impacting Cisco Unified Communications Manager (Unified CM) and Unified Communications Manager

REPORT · HOW · The Hacker NewsOPEN STORY
28 Aug
Attackers Chain Two PaperCut Flaws to Execute Code Without Authentication

Malicious actors are exploiting a newly patched security flaw in PaperCut NG and MF to execute arbitrary code on susceptible instances, as the company released a fresh emergency

REPORT · WHAT · The Hacker NewsOPEN STORY
16 Sept
Attackers Exploit Issabel Framework Flaw Enabling Unauthenticated OS Command Execution

A critical security flaw in Issabel Framework, a web-based framework for the open-source unified communications PBX software, has come under active exploitation. The vulnerability

REPORT · HOW · The Hacker NewsOPEN STORY
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