CVE-2026-43618
MEDIUM EPSS 46.2%
Published May 20, 20261mo ago · Modified Jun 17, 20261w ago
6.1 CVSS 4.0
Published May 20, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago
Description
Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/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 Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
46.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 2
CWE-125 Out-of-bounds Read Memory Safety
CWE-190 Integer Overflow or Wraparound Numeric Error
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| samba | rsync | * | ≤3.4.2 |
References 3
- github.com https://github.com/RsyncProject/rsync/releases/tag/v3.4.3
- github.com https://github.com/RsyncProject/rsync/security/advisories/GHSA-g37v-g3gj-pmwq
- vulncheck.com https://www.vulncheck.com/advisories/rsync-integer-overflow-information-disclosure
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.