Answer in brief
CVE-2025-52691 records a High severity vulnerability in Upload Arbitrary Files. The current sources mark it as known exploited. The current feed maps SmarterTools/SmarterMail (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps SmarterTools/SmarterMail (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| SmarterTools/SmarterMailgeneric | SmarterMail versions Build 9406 and earlier | Not reported |
Published upstream
Dec 29, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Feb 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Jan 26, 2026
Evidence: source:kev:kev:kev:recordSuccessful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-52691 records a High severity vulnerability in Upload Arbitrary Files. The current sources mark it as known exploited. The current feed maps SmarterTools/SmarterMail (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps SmarterTools/SmarterMail (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| SmarterTools/SmarterMailgeneric | SmarterMail versions Build 9406 and earlier | Not reported |
Published upstream
Dec 29, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Feb 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Jan 26, 2026
Evidence: source:kev:kev:kev:recordSuccessful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.
Quoted source text, attributed separately from HOL analysis.