An improper encoding or escaping of output vulnerability in Auth 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 attackers to obtain non-sensitive information.
CVE-2026-13635
MEDIUMPre-NVD 5.35.3—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 5.3 from GitHub Security Advisory published 2026-09-18. a secondary CVSS source baseline 5.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(high)
- EG Risk
- 39(Track)EG Risk 39/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity53% × 45%Exploitation0% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 19%
- KEV
- Not listed
Published
September 18, 2026
Last Modified
September 18, 2026
Advisory Details (1)
Auto-updated Sep 18, 2026No patch confirmed yet.
generic
Synology_SA_26_13 | Synology Inc.
https://www.synology.com/en-global/security/advisory/Synology_SA_26_13Vendor Advisories for CVE-2026-13635(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 8× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-18 20:31 UTCEG score recompute
- 2026-09-18 20:31 UTCGHSA enrichment
- 2026-09-18 19:27 UTCEPSS rescore
- 2026-09-18 19:13 UTCEG score recompute
- 2026-09-18 19:13 UTCGHSA enrichment
- 2026-09-18 09:18 UTCEG score recompute
- 2026-09-18 08:34 UTCEG score recompute
- 2026-09-18 08:34 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-13635?
CVE-2026-13635 is a medium vulnerability published on September 18, 2026. An improper encoding or escaping of output vulnerability in Auth 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 attackers to obtain non-sensitive information.
When was CVE-2026-13635 disclosed?
CVE-2026-13635 was first published in the National Vulnerability Database on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13635 actively exploited?
CVE-2026-13635 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 81.2% of all scored CVEs.
What is the CVSS score of CVE-2026-13635?
CVE-2026-13635 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-13635?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13635, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-13635
Is Your Infrastructure Affected by CVE-2026-13635?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.