CVE-2026-55977

LOWPre-NVD 3.33.3—
EchelonGraph scoreHIGH confidence

Score 3.3 from GitHub Security Advisory (severity: LOW) published 2026-07-28. a secondary CVSS source baseline 3.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
3.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.3Exploit: None knownExposed: 0

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

Successful exploitation of this vulnerability could allow an attacker with local network access to bypass the application's rate-limiting mechanism, enabling brute-forcing of the screen-sharing code and potentially displaying harmful content on the affected screen.

CVSS v3
3.3
EG Score
3.3(high)
EG Risk
15(Track)
EG Risk 15/100SSVC: 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
Severity33% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 30, 2026

References (1)

Vendor Advisories for CVE-2026-55977(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 11× in last 7d / 50× 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. 2026-08-26 14:46 UTCEPSS rescore
  2. 2026-08-26 02:58 UTCEG score recompute
  3. 2026-08-26 02:58 UTCGHSA enrichment
  4. 2026-08-25 13:49 UTCEPSS rescore
  5. 2026-08-23 04:34 UTCEG score recompute
  6. 2026-08-23 04:34 UTCGHSA enrichment
  7. 2026-08-23 00:19 UTCEPSS rescore
  8. 2026-08-21 23:49 UTCEPSS rescore
  9. 2026-08-20 22:55 UTCEPSS rescore
  10. 2026-08-20 06:12 UTCEG score recompute
  11. 2026-08-20 06:12 UTCGHSA enrichment
  12. 2026-08-19 17:04 UTCEPSS rescore
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-17 07:48 UTCEG score recompute
  15. 2026-08-17 07:48 UTCGHSA enrichment
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 09:26 UTCEG score recompute
  19. 2026-08-14 09:26 UTCGHSA enrichment
  20. 2026-08-13 22:00 UTCEPSS rescore
  21. 2026-08-11 11:03 UTCEG score recompute
  22. 2026-08-11 11:03 UTCGHSA enrichment
  23. 2026-08-11 00:00 UTCEPSS rescore
  24. 2026-08-09 13:46 UTCEPSS rescore
  25. 2026-08-08 16:37 UTCEPSS rescore
Show 25 more
  1. 2026-08-08 12:41 UTCEG score recompute
  2. 2026-08-08 12:41 UTCGHSA enrichment
  3. 2026-08-06 13:47 UTCEPSS rescore
  4. 2026-08-05 19:17 UTCEPSS rescore
  5. 2026-08-05 14:18 UTCEG score recompute
  6. 2026-08-05 14:18 UTCGHSA enrichment
  7. 2026-08-04 15:10 UTCEPSS rescore
  8. 2026-08-04 10:39 UTCEPSS rescore
  9. 2026-08-03 10:36 UTCEPSS rescore
  10. 2026-08-02 15:28 UTCEG score recompute
  11. 2026-08-02 15:28 UTCGHSA enrichment
  12. 2026-08-02 02:27 UTCEPSS rescore
  13. 2026-08-01 04:16 UTCEPSS rescore
  14. 2026-07-30 17:05 UTCEG score recompute
  15. 2026-07-30 17:05 UTCGHSA enrichment
  16. 2026-07-30 16:28 UTCEPSS rescore
  17. 2026-07-30 01:30 UTCEPSS rescore
  18. 2026-07-30 01:30 UTCEPSS rescore
  19. 2026-07-28 15:37 UTCEPSS rescore
  20. 2026-07-28 13:38 UTCEG score recompute
  21. 2026-07-28 13:38 UTCGHSA enrichment
  22. 2026-07-28 13:06 UTCEG score recompute
  23. 2026-07-28 13:06 UTCGHSA enrichment
  24. 2026-07-28 08:20 UTCEG score recompute
  25. 2026-07-28 08:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55977?
CVE-2026-55977 is a low vulnerability published on July 28, 2026. Successful exploitation of this vulnerability could allow an attacker with local network access to bypass the application's rate-limiting mechanism, enabling brute-forcing of the screen-sharing code and potentially displaying harmful content on the affected screen.
When was CVE-2026-55977 disclosed?
CVE-2026-55977 was first published in the National Vulnerability Database on July 28, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55977 actively exploited?
CVE-2026-55977 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 99.2% of all scored CVEs.
What is the CVSS score of CVE-2026-55977?
CVE-2026-55977 has a CVSS v3 base score of 3.3 (NVD).
How do I remediate CVE-2026-55977?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55977, 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-2026-55977

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