CVE-2026-78417

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-08-24. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

Insufficient verification of data authenticity in the IronVNC client in Devolutions Remote Desktop Manager 2026.2.17.0 and earlier, 2026.1.24.0 and earlier, allows an on-path attacker to intercept and tamper with VNC sessions via automatic acceptance of the server's RSA key during RSA-AES authentication.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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 computed
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

August 24, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 28, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

DEVO-2026-0029 - Advisory - Security

https://devolutions.net/security/advisories/DEVO-2026-0029/

Vendor Advisories for CVE-2026-78417(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 15× in last 7d / 61× 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. 2026-09-18 23:55 UTCEG score recompute
  2. 2026-09-18 23:55 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 21:43 UTCEG score recompute
  5. 2026-09-17 21:43 UTCGHSA enrichment
  6. 2026-09-16 19:30 UTCEG score recompute
  7. 2026-09-16 19:30 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-15 14:40 UTCEG score recompute
  10. 2026-09-15 14:40 UTCGHSA enrichment
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-15 03:12 UTCEPSS rescore
  13. 2026-09-14 12:22 UTCGHSA enrichment
  14. 2026-09-13 10:10 UTCEG score recompute
  15. 2026-09-13 10:10 UTCGHSA enrichment
  16. 2026-09-12 07:58 UTCEG score recompute
  17. 2026-09-12 07:58 UTCGHSA enrichment
  18. 2026-09-11 14:53 UTCEPSS rescore
  19. 2026-09-11 14:53 UTCEPSS rescore
  20. 2026-09-11 05:46 UTCEG score recompute
  21. 2026-09-11 05:46 UTCGHSA enrichment
  22. 2026-09-10 03:33 UTCGHSA enrichment
  23. 2026-09-09 01:21 UTCEG score recompute
  24. 2026-09-09 01:21 UTCGHSA enrichment
  25. 2026-09-08 22:01 UTCEPSS rescore
Show 36 more
  1. 2026-09-07 17:24 UTCEG score recompute
  2. 2026-09-07 17:24 UTCGHSA enrichment
  3. 2026-09-06 15:11 UTCEG score recompute
  4. 2026-09-06 15:11 UTCGHSA enrichment
  5. 2026-09-06 13:48 UTCEPSS rescore
  6. 2026-09-05 12:57 UTCEG score recompute
  7. 2026-09-05 12:57 UTCGHSA enrichment
  8. 2026-09-04 10:44 UTCEG score recompute
  9. 2026-09-04 10:44 UTCGHSA enrichment
  10. 2026-09-04 05:07 UTCEPSS rescore
  11. 2026-09-03 08:29 UTCGHSA enrichment
  12. 2026-09-02 06:14 UTCEG score recompute
  13. 2026-09-02 06:14 UTCGHSA enrichment
  14. 2026-09-01 13:54 UTCEPSS rescore
  15. 2026-09-01 03:59 UTCGHSA enrichment
  16. 2026-08-31 01:09 UTCEG score recompute
  17. 2026-08-31 01:09 UTCGHSA enrichment
  18. 2026-08-30 19:18 UTCEPSS rescore
  19. 2026-08-30 19:17 UTCEPSS rescore
  20. 2026-08-30 01:22 UTCEPSS rescore
  21. 2026-08-29 22:57 UTCEG score recompute
  22. 2026-08-29 22:57 UTCGHSA enrichment
  23. 2026-08-28 21:42 UTCEPSS rescore
  24. 2026-08-28 20:45 UTCGHSA enrichment
  25. 2026-08-28 19:42 UTCEG score recompute▲ 4.30
  26. 2026-08-28 19:42 UTCGHSA enrichment
  27. 2026-08-28 19:36 UTCMITRE cvelistV5CVSS v3 → 4.3 · severity → MEDIUM
  28. 2026-08-28 15:53 UTCGHSA enrichment
  29. 2026-08-27 20:45 UTCEG score recompute
  30. 2026-08-27 20:45 UTCGHSA enrichment
  31. 2026-08-27 14:25 UTCEPSS rescore
  32. 2026-08-26 14:47 UTCEPSS rescore
  33. 2026-08-25 13:49 UTCEPSS rescore
  34. 2026-08-24 19:24 UTCNVD update
  35. 2026-08-24 18:31 UTCEG score recompute
  36. 2026-08-24 18:31 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78417?
CVE-2026-78417 is a medium vulnerability published on August 24, 2026. Insufficient verification of data authenticity in the IronVNC client in Devolutions Remote Desktop Manager 2026.2.17.0 and earlier, 2026.1.24.0 and earlier, allows an on-path attacker to intercept and tamper with VNC sessions via automatic acceptance of the server's RSA key during RSA-AES…
When was CVE-2026-78417 disclosed?
CVE-2026-78417 was first published in the National Vulnerability Database on August 24, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78417 actively exploited?
CVE-2026-78417 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 98.7% of all scored CVEs.
What is the CVSS score of CVE-2026-78417?
CVE-2026-78417 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-78417?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78417, 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-2026-78417

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