CVE-2010-5304

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-04-21. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
7.5EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3.1%CVSS: 7.5Exploit: None knownExposed services: Not assessed

No fix has been recorded since the CVE record was published in 2020 — isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

A NULL pointer dereference flaw was found in the way LibVNCServer before 0.9.9 handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
39
EG Risk 39/100

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 (value × EchelonGraph’s weight)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation3.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability30% × 15%
EchelonGraph's default before algorithm v3.4: CISA had not published Automatable for this CVE.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix has been recorded since the CVE record was published in 2020. Isolate the affected system within your standard update timelines at low or medium mission impact and sooner than that at high (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.
EPSS PROB
3.1%
EPSS %ILE
87th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix has been recorded since the CVE record was published in 2020. Isolate the affected system within your standard update timelines at low or medium mission impact and sooner than that at high (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

Published

February 5, 2020

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Sep 29, 2026
No fix on record since 2020.
Web page

oss-security - Multiple issues in libVNCserver

http://www.openwall.com/lists/oss-security/2014/09/23/6
Web page

oss-sec: Multiple issues in libVNCserver

http://seclists.org/oss-sec/2014/q3/639

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 18× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 77 of 102 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 23 repeat rows among the latest 100 are merged into the row they repeat. The 25 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 13:38 UTCEPSS rescoreEPSS 3.1% · 87th percentile
  2. 2026-10-10 19:54 UTCEPSS rescoreEPSS 3.1% · 87th percentile
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  10. 2026-09-29 08:13 UTCEG score recompute
  11. 2026-09-28 13:44 UTCEPSS rescoreEPSS 3.1% · 87th percentile
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  1. 2026-08-09 13:41 UTCEPSS rescoreEPSS 3.1% · 86th percentile
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  9. 2026-07-23 01:04 UTCEG score recompute
  10. 2026-07-23 00:39 UTCEG score recompute
  11. 2026-07-23 00:07 UTCEG score recompute
  12. 2026-07-22 21:46 UTCEG score recompute
  13. 2026-07-22 14:03 UTCEPSS rescoreEPSS 3.1% · 86th percentile
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  44. 2026-06-14 23:14 UTCEPSS rescoreEPSS 3.4% · 87th percentile
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Frequently asked(5)

What is CVE-2010-5304?
CVE-2010-5304 is a high-severity vulnerability; its CVE record was published on February 5, 2020. A NULL pointer dereference flaw was found in the way LibVNCServer before 0.9.9 handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client.
When was the CVE record for CVE-2010-5304 published?
The CVE record for CVE-2010-5304 was published on February 5, 2020. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2010-5304 actively exploited?
CVE-2010-5304 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.1% probability of exploitation in the next 30 days (87th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2010-5304?
CVE-2010-5304 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2010-5304?
No fix for CVE-2010-5304 has been recorded since its CVE record was published in 2020, and neither the vendor feeds EchelonGraph reads nor the CVE record's references hold the vendor's own advisory. Isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

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