CVE-2026-40536
CVE-2026-40536 is covered by the Synology-SA-26:06 security bulletin. Not in the CISA KEV catalog. High advisory severity. 1 advisory from Synology.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
CVE-2026-40536 at a glance
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- High
- Vendor advisories
- 1 from Synology
- VulniPulse record
- Published · Updated
Is CVE-2026-40536 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-40536 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-40536?
This CVE is tracked through a multi-CVE bulletin, so its fixed releases may differ from the bulletin-wide values below. Check the vendor source.
Vendor advisory comparison
Synology
1 advisory- Advisory severityHigh8.0
High [CVE-2026-4036 +10] improper neutralization of CRLF sequences ('CRLF injection') vulnerability in User API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote authenticated users to read or write arbitrary files and conduct denial-of-service attacks after the system is rebooted
Synology-SA-26:06Source published Source updated
This bulletin covers 11 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
An improper neutralization of CRLF sequences ('CRLF injection') vulnerability in User API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote authenticated users to read or write arbitrary files and conduct denial-of-service attacks after the system is rebooted. Affected products named by the advisory: DSM 7.3; DSM 7.2.2; DSM 7.2.1.
- Affected products in this advisory
- DSM 7.3
- DSM 7.2.2
- DSM 7.2.1
- Source-reported affected versions
- before 7.2.1-69057-10
- Source-reported fixed versions
- 7.2.1-69057-10
- Mitigation guidance
- Upgrade the affected Synology product to a fixed release: 7.3.2-86009-2, 7.2.2-72806-7, 7.2.1-69057-10.
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