CVE-2016-9951

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2022-05-17. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 7%CVSS: 6.5Exploit: NoneExposed: 0

A fix is available — apply it.

An issue was discovered in Apport before 2.20.4. A malicious Apport crash file can contain a restart command in RespawnCommand or ProcCmdline fields. This command will be executed if a user clicks the Relaunch button on the Apport prompt from the malicious crash file. The fix is to only show the Relaunch button on Apport crash files generated by local systems. The Relaunch button will be hidden when crash files are opened directly in Apport-GTK.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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
Severity65% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
93.2%
KEV
Not listed

Published

December 17, 2016

Last Modified

May 6, 2026

References (12)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3-apport (2.20.3-0ubuntu8.2) @ yakkety2026-05-22ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 40× 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. 2026-07-24 14:13 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:25 UTCEG score recompute
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  59. 2026-05-24 16:44 UTCEPSS rescore
  60. 2026-05-22 21:15 UTCEPSS rescore
  61. 2026-05-22 17:33 UTCEG score recompute
  62. 2026-05-22 17:33 UTCVendor advisory
  63. 2026-05-22 17:33 UTCGHSA enrichment
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-40937
    First seen Dec 14, 2016

    Apport 2.x (Ubuntu Desktop 12.10 < 16.04) - Local Code Execution

    Open source ↗

Frequently asked(5)

What is CVE-2016-9951?
CVE-2016-9951 is a medium vulnerability published on December 17, 2016. An issue was discovered in Apport before 2.20.4. A malicious Apport crash file can contain a restart command in RespawnCommand or ProcCmdline fields. This command will be executed if a user clicks the Relaunch button on the Apport prompt from the malicious crash file. The fix is to only show the…
When was CVE-2016-9951 disclosed?
CVE-2016-9951 was first published in the National Vulnerability Database on December 17, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-9951 actively exploited?
CVE-2016-9951 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-9951?
CVE-2016-9951 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2016-9951?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-9951, 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.

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