Incident Score: Analysis & Impact (SYN1787208788)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Synacor's Vulnerability and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts Synacor Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the Synacor breach identified under incident ID SYN1787208788.
The analysis begins with a detailed overview of Synacor's information like the linkedin page: https://www.linkedin.com/company/synacor, the number of followers: 11175, the industry type: Software Development and the number of employees: 175 employees
After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 747 and after the incident was 742 with a difference of -5 which is could be a good indicator of the severity and impact of the incident.
In the next step of the video, we will analyze in more details the incident and the impact it had on Synacor and their customers.
On 20 July 2026, Zimbra Collaboration Suite users disclosed Remote Code Execution (RCE) issues under the banner "Critical Zimbra RCE Vulnerability Exploited in the Wild (CVE-2026-73570)".
CERT Polska has issued a warning about active exploitation of a critical remote code execution (RCE) vulnerability in Zimbra Collaboration Suite, tracked as CVE-2026-73570.
The disruption is felt across the environment, affecting Zimbra Collaboration Suite servers, and exposing Mailbox data.
In response, moved swiftly to contain the threat with measures like Inspect /var/log/zimbra.log for suspicious service-status messages, Review files created by the *zimbra* user in the last 30 days and Disable SNMP notifications if patching is delayed, and began remediation that includes Upgrade to Zimbra version 10.1.20 or later, Isolate compromised hosts and Rotate credentials.
The case underscores how and recommending next steps like Upgrade to Zimbra version 10.1.20 or later immediately, Disable SNMP notifications if patching is delayed and Monitor for suspicious activity in logs and file changes.
Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.
The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.
MITRE ATT&CK® Correlation Analysis
Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Exploit Public-Facing Application (T1190) with high confidence (90%), supported by evidence indicating critical RCE vulnerability in Zimbra Collaboration Suite (CVE-2026-73570). Under the Execution tactic, the analysis identified Exploitation for Client Execution (T1203) with high confidence (90%), supported by evidence indicating allows unauthenticated attackers to execute arbitrary OS commands as *zimbra* user and Command and Scripting Interpreter (T1059) with moderate to high confidence (80%), supported by evidence indicating oS command injection in SNMP monitoring functionality via SMTP requests. Under the Persistence tactic, the analysis identified Server Software Component: Web Shell (T1505.003) with moderate to high confidence (80%), supported by evidence indicating attackers deploy web shells on compromised servers and Create Account (T1136) with moderate confidence (50%), supported by evidence indicating unauthenticated command execution may allow account creation. Under the Privilege Escalation tactic, the analysis identified Exploitation for Privilege Escalation (T1068) with moderate to high confidence (70%), supported by evidence indicating command execution as *zimbra* user may lead to further privilege escalation. Under the Defense Evasion tactic, the analysis identified Masquerading (T1036) with moderate to high confidence (70%), supported by evidence indicating maliciously crafted SMTP requests bypass input sanitization and Hide Artifacts: Hidden Files and Directories (T1564.001) with moderate confidence (60%), supported by evidence indicating unexpected JSP files or scripts in /opt/zimbra/jetty/webapps/. Under the Credential Access tactic, the analysis identified Unsecured Credentials: Private Keys (T1552.004) with moderate confidence (60%), supported by evidence indicating mailbox data theft may include credentials or private keys. Under the Collection tactic, the analysis identified Email Collection (T1114) with high confidence (90%), supported by evidence indicating attackers steal mailbox data from compromised Zimbra servers. Under the Command and Control tactic, the analysis identified Ingress Tool Transfer (T1105) with moderate to high confidence (70%), supported by evidence indicating compromised servers used as launch point for further attacks. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating mailbox data exfiltration possible via command execution. Under the Lateral Movement tactic, the analysis identified Exploitation of Remote Services (T1210) with moderate to high confidence (70%), supported by evidence indicating compromised servers used as launch point for further attacks. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Synacor Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/synacor/incident/SYN1787208788
- Synacor CyberSecurity Rating page: https://www.rankiteo.com/company/synacor
- Synacor Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/syn1787208788-zimbra-vulnerability-july-2026/
- Synacor CyberSecurity Score History: https://www.rankiteo.com/company/synacor/history
- Synacor CyberSecurity Incident Source: https://cybersecuritynews.com/zimbra-rce-vulnerability-exploited/
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf