CVE-2026-13639
CVE-2026-13639 is covered by the Synology-SA-26:13 security bulletin. Not in the CISA KEV catalog. Critical 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-2026-13639 at a glance
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- Critical
- Vendor advisories
- 1 from Synology
- VulniPulse record
- Published · Updated
Is CVE-2026-13639 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-13639 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-2026-13639?
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 severityCritical9.8
Critical [CVE-2026-13623 +7] improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Theme API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote authenticated users with administrator privileges to read or write limited files
Synology-SA-26:13Source published Source updated
This bulletin covers 8 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Theme API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote authenticated users with administrator privileges to read or write limited files. Affected products named by the advisory: DSM 7.4; DSM 7.3; DSM 7.2.2; DSM 7.2.1.
- Affected products in this advisory
- DSM 7.4
- DSM 7.3
- DSM 7.2.2
- DSM 7.2.1
- Source-reported affected versions
- before 7.2.1-69057-12
- Source-reported fixed versions
- 7.2.1-69057-12
- Mitigation guidance
- Upgrade the affected Synology product to a fixed release: 7.4-90075, 7.3.2-86009-4, 7.2.2-72806-9, 7.2.1-69057-12.
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