CVE-2026-39255

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-17. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Buffer Overflow vulnerability in SteelSeries GG (macOS) v.107.0.0 allows a remote attacker to execute arbitrary code via the libSSEdevice.dylib, dup_wcs components

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 18, 2026

Advisory Details (1)

Auto-updated Aug 18, 2026
No patch confirmed yet.
generic

research/CSL-2026-03 at main · Cipher-Security-Labs/research · GitHub

https://github.com/Cipher-Security-Labs/research/tree/main/CSL-2026-03

Vendor Advisories for CVE-2026-39255(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 28× in last 7d / 28× 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. 2026-08-21 03:30 UTCGHSA enrichment
  2. 2026-08-20 23:22 UTCEG score recompute
  3. 2026-08-20 23:22 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 19:15 UTCGHSA enrichment
  6. 2026-08-20 15:07 UTCGHSA enrichment
  7. 2026-08-20 10:57 UTCGHSA enrichment
  8. 2026-08-20 06:50 UTCGHSA enrichment
  9. 2026-08-20 02:42 UTCGHSA enrichment
  10. 2026-08-19 22:28 UTCGHSA enrichment
  11. 2026-08-19 18:20 UTCEG score recompute
  12. 2026-08-19 18:20 UTCGHSA enrichment
  13. 2026-08-19 17:03 UTCEPSS rescore
  14. 2026-08-19 13:29 UTCGHSA enrichment
  15. 2026-08-19 09:21 UTCGHSA enrichment
  16. 2026-08-19 05:12 UTCGHSA enrichment
  17. 2026-08-19 01:02 UTCGHSA enrichment
  18. 2026-08-18 20:54 UTCEG score recompute
  19. 2026-08-18 20:54 UTCGHSA enrichment
  20. 2026-08-18 16:46 UTCGHSA enrichment
  21. 2026-08-18 16:12 UTCEG score recompute▲ 9.80
  22. 2026-08-18 16:11 UTCGHSA enrichment
  23. 2026-08-18 16:09 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  24. 2026-08-18 13:48 UTCEPSS rescore
  25. 2026-08-17 21:32 UTCGHSA enrichment
Show 3 more
  1. 2026-08-17 21:29 UTCNVD update
  2. 2026-08-17 20:45 UTCEG score recompute
  3. 2026-08-17 20:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-39255?
CVE-2026-39255 is a critical vulnerability published on August 17, 2026. Buffer Overflow vulnerability in SteelSeries GG (macOS) v.107.0.0 allows a remote attacker to execute arbitrary code via the libSSEdevice.dylib, dup_wcs components
When was CVE-2026-39255 disclosed?
CVE-2026-39255 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39255 actively exploited?
CVE-2026-39255 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.7% of all scored CVEs.
What is the CVSS score of CVE-2026-39255?
CVE-2026-39255 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-39255?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39255, 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-2026-39255

Explore →

Is Your Infrastructure Affected by CVE-2026-39255?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs