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Vulnerabilities

Vulnerability · CVE-2025-10158

A malicious client acting as the receiver of an rsync file transfer can trigger an out of bounds read of a heap based buffer, via a negative array index.

Published Nov 18, 2025 · catalog updated Nov 19, 2025 · A malicious client acting

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-10158. EPSS is 0.35%. Act only if a listed version of A malicious client acting is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A malicious client acting).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.35%
Remediation
Vendor / distro source
Affected products
vendor rsync rsync 0 ≤3.4.1

A malicious client acting as the receiver of an rsync file transfer can trigger an out of bounds read of a heap based buffer, via a negative array index. The malicious rsync client requires at least read access to the remote rsync module in order to trigger the issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor rsync rsync 0 ≤3.4.10 ≤3.4.1

How to fix CVE-2025-10158

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-10158. EPSS is 0.35%. Act only if a listed version of A malicious client acting is installed.

Which versions are affected?

Compare what you have installed with rsync rsync 0 ≤3.4.1 0 ≤3.4.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.35%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 18, 2025 · EUVD

    Detected

    A malicious client acting as the receiver of an rsync file transfer can trigger an out of bounds read of a heap based buffer, via a negative array index. The malicious rsync client requires at least read access to the remote rsync module in order to trigger the issue.

  2. Nov 19, 2025 · EUVD

    Updated

    A malicious client acting as the receiver of an rsync file transfer can trigger an out of bounds read of a heap based buffer, via a negative array index. The malicious rsync client requires at least read access to the remote rsync module in order to trigger the issue.

Sources

  • AttackerKBCited referencehttps://attackerkb.com/assessments/fbacb2a6-d1cd-4011-bb3a-f06b1c8306b1

    AttackerKB link already published on the finding.

    attackerkb.com
  • CVE.orgVulnerability recordCVE-2025-10158

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-10158

    30-day exploitation probability 0.35%

    first.org
  • EUVDVulnerability recordEUVD-2025-198005

    A malicious client acting as the receiver of an rsync file transfer can trigger an out of bounds read of a heap based buffer, via a negative array index. The malicious rsync client requires at least read access to the remote rsync module in order to trigger the issue.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • AttackerKBOct 29, 2026
  • CVE.orgOct 28, 2026
  • EUVDOct 28, 2026