CVE-2025-52691

criticalpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.857 · 100 %ileexploit · weaponizedDEEUNLRUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 9 exploits · weaponized

Likely / severe?

85.7% (100th) EPSS

CVSS 10 · critical

Is it mine?

6 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2026-01-26remediate by 2026-02-16

required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

EPSS · scored 2026-10-23

SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability

Successful 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.

cvss

Technical severity, 0–10. One row per scoring source.

10.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.110criticalAV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondaryexploitability 3.9 · impact 6

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · NCSC-NL NL

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-434USCWE-434USCWE-434US

exploits (9)

Public proof-of-concept and weaponised exploit code.

exploit/multi/http/smartermail_guid_file_uploadSmarterTools SmarterMail GUID File Upload Vulnerabilityweaponized · metasploit
DeathShotXD/CVE-2025-52691-APT-PoCAn enhanced proof-of-concept exploit for CVE-2025-52691 (SmarterMail Arbitrary File Upload RCE) with APT-level features like stealth obfuscation, persistence, exfiltration, and interactive mode. For educational and authorized testing only. Credits to the original PoC by yt2w/CVE-2025-52691.PoC · poc_in_github
Udyz/CVE-2025-52691Udyz/CVE-2025-52691PoC · poc_in_github
mohammadzarnian1357/Ashwesker-CVE-2025-52691CVE-2025-52691PoC · poc_in_github
nxgn-kd01/smartermail-cve-scannerCVE-2025-52691 Scanner - Detects vulnerable SmarterMail installations (CVSS 10.0 RCE)PoC · poc_in_github
rimbadirgantara/CVE-2025-52691-pocrimbadirgantara/CVE-2025-52691-pocPoC · poc_in_github

affected products (6)

Products and version ranges known to be affected.

SmarterTools SmarterMail <Build 9413all versionscert_bundDE
SmarterTools SmarterMail< Build 9413cert_bundDE
SmarterTools SmarterMail≤ SmarterMail versions Build 9406 and earlierenisa_euvdEU
SmarterTools Inc. SmarterMail≤ 9413fstec_bduRU
SmarterTools SmarterMail≤ vers:unknown/*ncsc_nlNL
smartertools smartermail< 100.0.9413nvdUScpe:2.3:a:smartertools:smartermail:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

NCSC-2025-0404Kwetsbaarheid verholpen in SmarterMailNL2025-12-31csaf · ncsc_nlNL
SmarterTools heeft een kwetsbaarheid verholpen in SmarterMail.
WID-SEC-W-2026-0007SmarterTools SmarterMail: Schwachstelle ermöglicht CodeausführungDeutsch2026-01-04csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in SmarterTools SmarterMail ausnutzen, um beliebigen Programmcode auszuführen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl nvd NVD CVE.org MITRE

published 2025-12-29modified 2026-09-16

references (6)

External citations — patches, advisories, analysis.

scry

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