--- title: "Remote Vulnerability Affecting Over 50% of Mail Servers | DuoCircle" description: "A remote vulnerability has been discovered in the EXIM email server that allows an attacker to run commands as root. https://www.zdnet." image: "https://www.duocircle.com/images/og-default.png" canonical: "https://www.duocircle.com/blog/spam-filtering/remote-vulnerability-affecting-over-50-of-mail-servers/" --- Quick Answer A remote code execution vulnerability in the Exim mail server allowed an attacker to run commands as root, exposing roughly half of internet mail servers running Exim. Operators should patch immediately. Sites that route inbound mail through a cloud email gateway are shielded from direct internet exposure of the vulnerable Exim host. Share [ ](https://www.linkedin.com/sharing/share-offsite/?url=undefined%2Fblog%2Fspam-filtering%2Fremote-vulnerability-affecting-over-50-of-mail-servers%2F "Share on LinkedIn") [ ](https://twitter.com/intent/tweet?text=Remote%20Vulnerability%20Affecting%20Over%2050%25%20of%20Mail%20Servers&url=undefined%2Fblog%2Fspam-filtering%2Fremote-vulnerability-affecting-over-50-of-mail-servers%2F "Share on X/Twitter") [ ](https://www.facebook.com/sharer/sharer.php?u=undefined%2Fblog%2Fspam-filtering%2Fremote-vulnerability-affecting-over-50-of-mail-servers%2F "Share on Facebook") [ ](https://reddit.com/submit?url=undefined%2Fblog%2Fspam-filtering%2Fremote-vulnerability-affecting-over-50-of-mail-servers%2F&title=Remote%20Vulnerability%20Affecting%20Over%2050%25%20of%20Mail%20Servers "Share on Reddit") [ ](mailto:?subject=Remote%20Vulnerability%20Affecting%20Over%2050%25%20of%20Mail%20Servers&body=Check out this article: undefined%2Fblog%2Fspam-filtering%2Fremote-vulnerability-affecting-over-50-of-mail-servers%2F "Share via Email") ![mail servers](https://media.mailhop.org/duocircle/images/2019/06/smtp-email-7813.jpg) A remote vulnerability has been discovered in the EXIM email server that allows an attacker to run commands as root. If your mail server is running EXIM our [email gateway](/email/spam-filtering) can offer you complete protection from this exploit and can keep your users safe. The service is cloud-deployed and fully managed and can scale from a single domain to hosting providers needing filtering for tens of thousands of domains. ![Brad Slavin](https://media.mailhop.org/dmarcreport/images/team/brad-slavin.jpg) Brad Slavin General Manager General Manager at DuoCircle. Product strategy and commercial lead across the email security portfolio. ## Secure your email infrastructure Protect, authenticate, and deliver. Contact our team to find the right solution. [Contact Sales](/contact/) [Explore Products](/products/) Share this article [ ](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fwww.duocircle.com%2Fblog%2Fspam-filtering%2Fremote-vulnerability-affecting-over-50-of-mail-servers%2F) [ ](https://twitter.com/intent/tweet?text=Remote%20Vulnerability%20Affecting%20Over%2050%25%20of%20Mail%20Servers&url=https%3A%2F%2Fwww.duocircle.com%2Fblog%2Fspam-filtering%2Fremote-vulnerability-affecting-over-50-of-mail-servers%2F) [ ](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fwww.duocircle.com%2Fblog%2Fspam-filtering%2Fremote-vulnerability-affecting-over-50-of-mail-servers%2F) Copy Related Articles - [ ![Secure Email Gateway](https://media.mailhop.org/duocircle/images/2021/03/spf-record-9932.jpg) A Guide On Email Gateway: What It Is And The Importance Of A Secure Email Gateway Spam Filtering ](/blog/spam-filtering/a-guide-on-email-gateway-what-it-is-and-the-importance-of-a-secure-email-gateway/) - [ ![Anti-Spam Filters](https://media.mailhop.org/duocircle/images/2020/06/email-sending-services-7776.jpg) Anti-Spam Filters and How They Work Spam Filtering ](/blog/spam-filtering/anti-spam-filters-and-how-they-work/) - [ CERT Advisory Symantec and Norton Critical Vulnerability Spam Filtering ](/blog/spam-filtering/cert-advisory-symantec-norton-critical-vulnerability/) - [ ![Cloud-Based Spam Filtering Protects](https://media.mailhop.org/duocircle/images/2018/09/spf-permerror-7776.jpg) Cloud-Based Spam Filtering Protects Your Company Spam Filtering ](/blog/spam-filtering/cloud-based-spam-filtering-protects-your-company/) ## Related Articles [ Spam Filtering 5m A Guide On Email Gateway: What It Is And The Importance Of A Secure Email Gateway Mar 4, 2021 ](/blog/spam-filtering/a-guide-on-email-gateway-what-it-is-and-the-importance-of-a-secure-email-gateway/)[ Spam Filtering 5m Anti-Spam Filters and How They Work Jun 19, 2020 ](/blog/spam-filtering/anti-spam-filters-and-how-they-work/)[ Spam Filtering 1m CERT Advisory Symantec and Norton Critical Vulnerability Jul 6, 2016 ](/blog/spam-filtering/cert-advisory-symantec-norton-critical-vulnerability/)[ Spam Filtering 3m Cloud-Based Spam Filtering Protects Your Company Sep 10, 2018 ](/blog/spam-filtering/cloud-based-spam-filtering-protects-your-company/) ```json {"@context":"https://schema.org","@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. 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