Phishers Exploit Amazon SES to Slip Past Email Security Filters
Vulnerability coverage focused on affected versions, exploitability and patch or mitigation decisions.
By: Artur Ślesik
Published: May 04, 2026
Incident status: Active threat
Corroborating sources: 1
Technical review credentials: Security+ evidence | RHCSA evidence | JNCIS-SEC evidence
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Technical reviewer note: Marcin Pocztowski reviewed this alert on May 04, 2026 for infrastructure relevance, source consistency and whether the remediation advice would make sense to an administrator responsible for live routers and servers. His note keeps the action list grounded: validate scope, reduce exposed management paths, keep evidence intact and avoid claims that go beyond the 1 corroborating source.
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Active threat. The incident should still be treated as active until confirmed mitigation or patch adoption is verified.
Amazon Simple Email Service (SES) is increasingly targeted by cybercriminals to send phishing emails that evade detection by standard security tools. This tactic undermines reputation-based blocking and poses heightened risks to users and organizations relying on email security.
GLOBAL, May 4, 2026, 20:24 UTC
Cybercriminals are exploiting Amazon Simple Email Service (SES) to send phishing emails that bypass conventional email security filters, researchers reported. This abuse of a trusted cloud email platform allows attackers to evade reputation-based blocks, complicating efforts to detect and stop phishing campaigns.
Amazon SES is a cloud-based email sending service used by businesses to send transactional and marketing emails. Its legitimate reputation and infrastructure make it an attractive vehicle for threat actors aiming to deliver malicious emails without triggering security defenses.
According to a report by BleepingComputer, phishing campaigns leveraging Amazon SES have surged recently. The attackers register and configure SES accounts to send emails that appear authentic, reducing the likelihood of being flagged by spam filters or blacklists.
This method undermines traditional security measures that rely heavily on sender reputation and IP address blacklisting. Since Amazon SES IP ranges are widely trusted, phishing emails sent through the service often reach recipients' inboxes unchallenged.
The phishing messages typically impersonate well-known companies and include links or attachments designed to steal credentials or deliver malware. The use of SES infrastructure adds a layer of legitimacy, increasing the chances victims will engage with the content.
Security experts warn that organizations and individuals should not rely solely on reputation-based email filtering. Instead, they recommend implementing multi-layered defenses such as advanced threat detection, URL scanning, and user awareness training to identify and mitigate these sophisticated phishing attempts.
Amazon has not publicly commented on these specific abuses but maintains policies to detect and suspend accounts involved in malicious activity. However, the rapid creation and use of SES accounts for phishing complicate enforcement efforts.
Users are advised to scrutinize unexpected emails, especially those requesting sensitive information or prompting urgent action. Verifying sender details and avoiding clicking on unsolicited links remain critical defensive steps.
The rise in SES-based phishing reflects a broader trend of attackers leveraging reputable cloud services to mask malicious activity. This shift challenges defenders to adapt their detection strategies beyond traditional reputation models.
While Amazon SES offers robust tools for legitimate email delivery, its misuse highlights the persistent cat-and-mouse dynamic between attackers and security teams. Vigilance and layered security remain essential to counter evolving phishing tactics.
https://www.bleepingcomputer.com/news/security/amazon-ses-increasingly-abused-in-phishing-to-evade-detection/
Sources used for this article
BleepingComputer
