CVE-2024-10635: Enterprise Protection contains an improper input validation vulnerability in attachment defense that allows an

Routine

MEDIUM 6.1DOWNGRADE

CVE-2024-10635 is a medium-severity flaw (CVSS 6.1) affecting enterprise protection. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Enterprise Protection contains an improper input validation vulnerability in attachment defense that allows an unauthenticated remote attacker to bypass attachment scanning security policy by sending a malicious S/MIME attachment with an opaque signature. When opened by a recipient in a downstream email client, the malicious attachment could cause partial loss of integrity and confidentiality to their system.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-754
Published	2025-04-28
Last modified	2026-06-17

Publisher (CNA): Proofpoint Inc. · Vendor: proofpoint

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-28 21:15 UTCPublished CVE record published
2026-06-17 06:56 UTCUpdated Record last modified

proofpoint enterprise protection DOWNGRADE

Affected: 8.18.6 · 8.20.6 · 8.21.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.18.6

1. Check installed version

apt-cache policy enterprise-protection || rpm -q enterprise-protection || enterprise-protection --version

2. No fixed release: DOWNGRADE to a release before 8.18.6 (Debian / Ubuntu)

apt-cache madison enterprise-protection sudo apt install enterprise-protection=<VERSION_BEFORE_8.18.6> sudo apt-mark hold enterprise-protection

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list enterprise-protection sudo dnf downgrade enterprise-protection-<VERSION_BEFORE_8.18.6> sudo dnf versionlock add enterprise-protection

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-10635?

enterprise protection: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-10635 being exploited?

CVE-2024-10635 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-10635 affect?

CVE-2024-10635 affects enterprise protection. Severity is medium (CVSS 6.1). Enterprise Protection contains an improper input validation vulnerability in attachment defense that allows an unauthenticated remote attacker to bypass attachment scanning security policy by sending a malicious S/MIME attachment with an op

How urgent is CVE-2024-10635?

Priority 27/100. No elevated risk signals yet.

References

← Back to latest CVEs