CVE-2026-35025: ProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated

Q: How do I fix CVE-2026-35025?

proftpd: upgrade to newer than 1.3.9b. Exact commands for each OS are on this page.

Q: Is CVE-2026-35025 being exploited?

CVE-2026-35025 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-35025 affect?

CVE-2026-35025 affects proftpd. Severity is high (CVSS 8.1). ProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated FTP users to circumvent Directory ACL restrictions by prefixing paths with /proc/self/root in the RNFR command handler. Attackers

Routine

HIGH 8.1UPGRADE

CVE-2026-35025 is a high-severity flaw (CVSS 8.1) affecting proftpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated FTP users to circumvent Directory ACL restrictions by prefixing paths with /proc/self/root in the RNFR command handler. Attackers can exploit the unresolved symlink components in dir_canonical_path() to cause dir_check() to perform lexical path comparisons that match no configured Directory block, enabling rename operations on files in D

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-59
Published	2026-06-24
Last modified	2026-10-25

Publisher (CNA): VulnCheck · Vendor: proftpd

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-24 14:17 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

proftpd proftpd UPGRADE

Affected: <= 1.3.9b · 1.3.10 rc1 · 1.3.10 rc2

Fixed in: newer than 1.3.9b

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy proftpd || rpm -q proftpd || proftpd --version

2. UPGRADE to newer than 1.3.9b (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade proftpd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade proftpd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-35025?

proftpd: upgrade to newer than 1.3.9b. Exact commands for each OS are on this page.

Is CVE-2026-35025 being exploited?

CVE-2026-35025 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-2026-35025 affect?

CVE-2026-35025 affects proftpd. Severity is high (CVSS 8.1). ProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated FTP users to circumvent Directory ACL restrictions by prefixing paths with /proc/self/root in the RNFR command handler. Attackers

How urgent is CVE-2026-35025?

Priority 39/100. High severity

Software pages

ProFTPD vulnerabilities

Related CVEs

CVE-2026-53994 HIGH 7.5 UPGRADE ProFTPD mod_sftp contains a heap-based buffer overflow reachable by an authenticated SFTP user
CVE-2015-3306 CRITICAL 10.0 EXPLOITED MITIGATE MITIGATE ProFTPD Improper Access Control Vulnerability

References

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