NTAP-20261104-0005 — CVE-2026-53791 Rsync Vulnerability in NetApp Products

Product family: Baseboard management controllers · SolidFire / NetApp HCI  |  other NetApp product  |  highest CVSS: 9.1

CVEs in this advisory

• CVE-2026-53791 — CRITICAL · CVSS 9.1 · site index

What the CVE records say

CVE-2026-53791 — rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote attackers to bypass IP-based access controls by sending a crafted PROXY protocol header with a forged source address. Attackers who can connect directly to the rsync daemon can inject a spoofed source IP in the PROXY protocol header to circumvent hosts allow/deny rules, gaining unauthorized access that would otherwise be blocked based on their real source address.

Impact

Successful exploitation of this vulnerability could lead to disclosure of sensitive information or addition or modification of data.

Affected products

• AFF Baseboard Management Controller (BMC) - A700s
• FAS/AFF Baseboard Management Controller (BMC) - 8300/8700/A400/C400
• NetApp HCI Baseboard Management Controller (BMC) - H610S
• NetApp SolidFire & HCI Management Node
• NetApp SolidFire & HCI Storage Node (Element Software)

References

• https://github.com/RsyncProject/rsync/security/advisories/GHSA-h2q9-5fr8-w635 ↗

What to do

1. Compare your installed product and version against the affected list above and the official advisory's affected-versions table.
2. Apply the fixed release named in the official advisory, or the documented workaround if no fix ships yet.
3. Limit management-plane exposure (BMC/management interfaces, web UIs, SNMP) until patched.
4. Track follow-ups in the site CVE index and the security RSS feed.

Related reading

• Site CVE index — every CVE we track, split by year
• Security hub — recent NetApp advisories and what changed
• Security hardening baseline — applies to NetApp management planes generally
• Every NetApp advisory published in 2026

Browse all ONTAP CVEs → · Security hub