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NVD / CVE Program· CNA VulnCheck

CVE-2026-53795: rsync < 3.5.0 Arbitrary File Write via --temp-dir/--link-dest

Noroxi assessment

Priority: Monitor (action score 28/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.39% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: rsync (AlmaLinux:10) 3.5.0-3.el10_2; rsync-daemon (AlmaLinux:10) 3.5.0-3.el10_2; rsync-rrsync (AlmaLinux:10) 3.5.0-3.el10_2.

Low priority for now. Upgrade to rsync (AlmaLinux:10) 3.5.0-3.el10_2; rsync-daemon (AlmaLinux:10) 3.5.0-3.el10_2; rsync-rrsync (AlmaLinux:10) 3.5.0-3.el10_2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

rsync before 3.5.0 contains an arbitrary file write vulnerability that allows attackers to write files outside the intended destination tree by specifying an absolute path via --temp-dir or --link-dest options. The rename-confinement logic is bypassed when these options resolve to paths outside the destination tree, enabling attacker-controlled values to write files to arbitrary locations accessible to the rsync process.

HighCVSS 7.2 · v4.0—No exploit Fix available
Published
Aug 13, 2026
Updated
Oct 24, 2026
EPSS
0.3% · 33th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
7.2
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-53795

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
sambarsync

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • samba rsyncbefore 3.5.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • RsyncProject rsync

    • 3.5.0not affected
    • up to and including 3.4.4affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10rsyncbefore 3.5.0-3.el10_23.5.0-3.el10_2
AlmaLinux:10rsync-daemonbefore 3.5.0-3.el10_23.5.0-3.el10_2
AlmaLinux:10rsync-rrsyncbefore 3.5.0-3.el10_23.5.0-3.el10_2
AlmaLinux:8rsyncbefore 3.1.3-28.el8_103.1.3-28.el8_10
AlmaLinux:8rsync-daemonbefore 3.1.3-28.el8_103.1.3-28.el8_10
AlmaLinux:9rsyncbefore 3.2.7-1.el9_83.2.7-1.el9_8
AlmaLinux:9rsync-daemonbefore 3.2.7-1.el9_83.2.7-1.el9_8
AlmaLinux:9rsync-rrsyncbefore 3.2.7-1.el9_83.2.7-1.el9_8
Alpine:v3.21rsyncbefore 3.5.0-r03.5.0-r0
Debian:12rsyncfrom 0—
Debian:13rsyncbefore 3.5.0+ds1-0+deb13u13.5.0+ds1-0+deb13u1
Debian:14rsyncbefore 3.5.0+ds1-13.5.0+ds1-1
openSUSE:Leap 16.0rsyncbefore 3.4.1-160000.6.13.4.1-160000.6.1
openSUSE:Tumbleweedrsyncbefore 3.5.1-1.13.5.1-1.1
Red Hat:enterprise_linux:10.2rsyncbefore 0:3.5.0-3.el10_20:3.5.0-3.el10_2
Red Hat:enterprise_linux:10.2rsync-daemonbefore 0:3.5.0-3.el10_20:3.5.0-3.el10_2
Red Hat:enterprise_linux:10.2rsync-debuginfobefore 0:3.5.0-3.el10_20:3.5.0-3.el10_2
Red Hat:enterprise_linux:10.2rsync-debugsourcebefore 0:3.5.0-3.el10_20:3.5.0-3.el10_2
Red Hat:enterprise_linux:10.2rsync-rrsyncbefore 0:3.5.0-3.el10_20:3.5.0-3.el10_2
Red Hat:enterprise_linux:8::baseosrsyncbefore 0:3.1.3-28.el8_100:3.1.3-28.el8_10
Red Hat:enterprise_linux:8::baseosrsync-daemonbefore 0:3.1.3-28.el8_100:3.1.3-28.el8_10
Red Hat:enterprise_linux:8::baseosrsync-debuginfobefore 0:3.1.3-28.el8_100:3.1.3-28.el8_10
Red Hat:enterprise_linux:8::baseosrsync-debugsourcebefore 0:3.1.3-28.el8_100:3.1.3-28.el8_10
Red Hat:enterprise_linux:9::appstreamrsync-daemonbefore 0:3.2.7-1.el9_80:3.2.7-1.el9_8

+12

Same product

samba: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-12084Rsync: heap buffer overflow in rsync due to improper checksum length handling
    61This week
  • CVE-2017-16548The receive_xattr function in xattrs.c in rsync 3.1.2 and 3.1.3-development does not check for a trailing '\0' character in an xattr name, w
    41Plan
  • CVE-2017-17434The daemon in rsync 3.1.2, and 3.1.3-development before 2017-12-03, does not check for fnamecmp filenames in the daemon_filter_list data str
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-53789Aug 13, 2026 · rsync < 3.5.0 Arbitrary File Deletion via Malicious File List
    28Monitor
  • ← EarlierCVE-2026-53791Aug 13, 2026 · rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header
    36Monitor
  • Later →CVE-2026-53797Aug 13, 2026 · rsync < 3.5.0 Symlink Race Condition Information Disclosure
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:rsync3.2.7-1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:rsync-daemon3.2.7-1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:rsync-rrsync3.2.7-1.el9_8 · AlmaLinux:9Package registry (OSV)
alpine:rsync3.5.0-r0 · Alpine:v3.21Package registry (OSV)
debian:rsync3.5.0+ds1-0+deb13u1 · Debian:13Package registry (OSV)
opensuse:rsync3.5.1-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:rsync0:3.2.7-1.el9_8 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:rsync-daemon0:3.2.7-1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:rsync-debuginfo0:3.2.7-1.el9_8 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:rsync-debugsource0:3.2.7-1.el9_8 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:rsync-rrsync0:3.2.7-1.el9_8 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
rocky linux:rsync0:3.2.7-1.el9_8 · Rocky Linux:9Package registry (OSV)
suse:rsync3.2.7-8.1 · SUSE:Linux Micro 6.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-538030 days apartrsync < 3.5.0 Symlink Following Arbitrary File Overwrite
    34Monitor
  • CVE-2026-537840 days apartrsync < 3.5.0 Path Traversal via Symlink Module Root
    33Monitor
  • CVE-2026-538010 days apartrsync < 3.5.0 Symlink Race Condition Directory Traversal
    32Monitor
  • CVE-2026-537990 days apartrsync < 3.5.0 Symlink Race Condition via ACL/xattr Application
    28Monitor
  • CVE-2026-4361986 days apartRsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls
    28Monitor
  • CVE-2026-537970 days apartrsync < 3.5.0 Symlink Race Condition Information Disclosure
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
P
Scope
X

Weakness class (CWE)

CWE-59 · Improper Link Resolution Before File Access ('Link Following')

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records