Vulnerability in Synology Assistant (August 10, 2026)

unknownCVE-2026-4793

A vulnerability was discovered in Synology Assistant. It allows an attacker to cause compromise of data confidentiality, compromise of data integrity, and denial of service.

CSIRTS triage

vendor: Synology product: Assistant Information disclosureOther

What: A vulnerability in Synology Assistant compromises data confidentiality and integrity and enables denial of service.
Who is affected: Systems running Synology Assistant.
Urgency: Urgency level unclear; data confidentiality and integrity impact warrant prompt attention once severity is confirmed.
Action: Apply Synology security update for Assistant when available.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-FR Avis de sécurité (FR · national-cert · site)
Severity: unknown
Published: 2026-08-10
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0988/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-47930.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-4793	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Synology Assistant

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownImproper file access permission settings in Synology Assistantjvn · 2026-08-17
highCVE-2026-4793: An incorrect default permissions vulnerability in Synology Assistant before 7.0.7-50095 allows …nvd · 2026-08-03