Unauthenticated file read via subscriber name traversal
Published Sep 10, 2026 · Updated Sep 10, 2026
Directory traversal in AcyMailing 11.0.4 and earlier allows remote attackers to read arbitrary server files through user[name]. The image-embedding path treats the submitted subscriber name as a filesystem path and reads it without confining resolution to an allowed directory. Exploitation requires the Embed images option to be enabled and provides file contents without reported file modification or code execution.
Summary
What happened
Directory traversal in AcyMailing 11.0.4 and earlier allows remote attackers to read arbitrary server files through user[name]. The image-embedding path treats the submitted subscriber name as a filesystem path and reads it without confining resolution to an allowed directory. Exploitation requires the Embed images option to be enabled and provides file contents without reported file modification or code execution.
The record
- CVE
- CVE-2026-77807
- Published
- Sep 10, 2026
- Updated
- Sep 10, 2026
- Vendor
- AcyMailing Newsletter Team
- Product
- AcyMailing
- Classifications
- CWE-22, T1190, T1005
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 10, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=11.0.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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