CVE
Synology DiskStation Manager SQL injection in user API allows file read and write
Affects Synology DiskStation Manager (DSM) 7.3.2 before 7.3.2-86009-5 and 7.4.1 before 7.4.1-90080-1, in the User API. Fixed in 7.3.2-86009-5 and 7.4.1-90080-1.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 7.4.1-90080-1, 7.3.2-86009-5
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 7.4.1-90080-1, 7.3.2-86009-5.
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.56% · 47th percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 25/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Synology DiskStation Manager (DSM) has an SQL command flaw in its User API. Remote attackers who control a compromised LDAP or Active Directory server can use it, without logging in, to read or write arbitrary files and to cause denial-of-service attacks.
Read the original description
An improper neutralization of special elements used in an SQL command vulnerability in the User API in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote attackers with control over a compromised LDAP or Active Directory server to read or write arbitrary files and conduct denial-of-service attacks.
Who should check
Teams running Synology DiskStation Manager (DSM) before 7.3.2-86009-5 or 7.4.1-90080-1 that use LDAP or Active Directory with the User API
Read the source excerpt
“in the User API in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1”
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed, reachable over the network without a login · Unknown: Advisories don't say whether default setups are affected
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.1/10CVSS 8.1
- No patch0/5No signal
What would change the score
- Would score about 70 if added to CISA KEV
- Would score about 65 if CISA's SSVC rates exploitation active
- Would score about 30 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 7.4.1-90080-1, 7.3.2-86009-5.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-81584 (An improper neutralization of special elements used in an SQL command vulnerability in the User API in Synology DiskStation Manager (DSM)…), using the cve.now data below.
Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.
What cve.now has for CVE-2026-81584 (entry last updated 2026-11-12):
Affected:
- Synology DiskStation Manager (DSM): from 7.4.1, fixed in 7.4.1-90080-1; from 7.3.2, fixed in 7.3.2-86009-5
Fixed versions: 7.4.1-90080-1, 7.3.2-86009-5.
Conditions (all must be true for the bug to be hit):
- Affected product is Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1, in the User API. (source: https://www.synology.com/en-global/security/advisory/Synology_SA_26_18)
- Attacker must control a compromised LDAP or Active Directory server. (source: https://www.synology.com/en-global/security/advisory/Synology_SA_26_18)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, no login, no user action.
CISA KEV: CVE-2026-81584 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-81584 only. If you also check another CVE, look up its own KEV status; never assume it from this one.
How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.
Verify against the linked advisories before concluding, and cite the date you read each one:
- https://www.synology.com/en-global/security/advisory/Synology_SA_26_18
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.
Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.
Entry: https://cve.now/CVE-2026-81584
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-81584"}.Timeline
- CVE published
- First seen by cve.now
Affected versions
- Synology DiskStation Manager (DSM)
From 7.4.1 · fixed in 7.4.1-90080-1; From 7.3.2 · fixed in 7.3.2-86009-5
Evidence 3
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Link
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-81584
Is CVE-2026-81584 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
An SQL command in the DSM User API does not properly neutralize special elements. Remote attackers who control a compromised LDAP or Active Directory server can read or write arbitrary files and conduct denial-of-service attacks.Source: synology.com
Which versions are affected by CVE-2026-81584?
DiskStation Manager (DSM): from 7.4.1 before 7.4.1-90080-1; from 7.3.2 before 7.3.2-86009-5.Source: cve.now feed data
Am I affected, and how do I check?
DSM 7.3.2 before 7.3.2-86009-5 and DSM 7.4.1 before 7.4.1-90080-1 are affected. Check the installed DSM version against these builds; the attack depends on a compromised LDAP or Active Directory server.Source: synology.com
How do I fix CVE-2026-81584?
Update to DSM 7.3.2-86009-5 or later on the 7.3.2 branch, or to 7.4.1-90080-1 or later on the 7.4.1 branch.Source: synology.com