CVE-2026-42218

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 66% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a timing side-channel vulnerability in the login interface. Due to a discrepancy in response processing times, a remote attacker can infer the existence of a username on the system, leading to unauthorized information disclosure via username enumeration. This issue has been fixed in version 0.10.6.1.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EPSS
34.2%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jul 21, 2026
Patch available. Sources: github_release, github.
github Patch Available

Timing side-channel in xrdp allows username enumeration · Advisory · neutrinolabs/xrdp · GitHub

https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3wr5-fwmh-qh34
github_release Patch Available

xrdp v0.10.6.1

Patch available: neutrinolabs/xrdp v0.10.6.1

https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 6× 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.

  1. 2026-07-22 23:35 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-20 18:41 UTCEG score recompute
  5. 2026-07-20 17:11 UTCEG score recompute
  6. 2026-07-20 17:09 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-42218?
CVE-2026-42218 is a medium vulnerability published on July 20, 2026. xrdp is an open source RDP server. Versions 0.10.6 and prior contain a timing side-channel vulnerability in the login interface. Due to a discrepancy in response processing times, a remote attacker can infer the existence of a username on the system, leading to unauthorized information disclosure…
When was CVE-2026-42218 disclosed?
CVE-2026-42218 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42218 actively exploited?
CVE-2026-42218 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42218?
CVE-2026-42218 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-42218?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42218, 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

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