CVE-2016-9565

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekWeaponized
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 23%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

MagpieRSS, as used in the front-end component in Nagios Core before 4.2.2 might allow remote attackers to read or write to arbitrary files by spoofing a crafted response from the Nagios RSS feed server. NOTE: this vulnerability exists because of an incomplete fix for CVE-2008-4796.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Track*)
EG Risk 75/100SSVC: 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%
Exploitation65% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
97.5%
KEV
Not listed

Published

December 15, 2016

Last Modified

May 6, 2026

Advisory Details (10)

Auto-updated May 9, 2026
No patch confirmed yet.
generic
http://www.securityfocus.com/bid/94922
generic
http://www.securityfocus.com/archive/1/539925/100/0/threaded
generic

Full Disclosure: Nagios Core < 4.2.2 Curl Command Injection leading to Remote Code Execution [CVE-2016-9565]

http://seclists.org/fulldisclosure/2016/Dec/57
generic
http://rhn.redhat.com/errata/RHSA-2017-0259.html
generic
http://rhn.redhat.com/errata/RHSA-2017-0258.html
generic
http://rhn.redhat.com/errata/RHSA-2017-0214.html
generic
http://rhn.redhat.com/errata/RHSA-2017-0213.html
generic
http://rhn.redhat.com/errata/RHSA-2017-0212.html
generic
http://rhn.redhat.com/errata/RHSA-2017-0211.html
generic

Packet Storm

http://packetstormsecurity.com/files/140169/Nagios-Core-Curl-Command-Injection-Code-Execution.html

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatnagios-0:3.5.1-9.el62017-02-07redhat
redhatnagios-0:3.5.1-9.el72017-02-07redhat

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

(6)

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 15× in last 7d / 42× 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.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-07-25 05:41 UTCOSV refresh
  2. 2026-07-24 14:13 UTCEPSS rescore
  3. 2026-07-23 14:15 UTCEPSS rescore
  4. 2026-07-23 01:24 UTCEG score recompute
  5. 2026-07-22 22:04 UTCEG score recompute
  6. 2026-07-22 14:04 UTCEPSS rescore
  7. 2026-07-21 15:21 UTCEPSS rescore
  8. 2026-07-21 15:21 UTCEPSS rescore
  9. 2026-07-20 17:04 UTCEPSS rescore
  10. 2026-07-19 14:28 UTCEPSS rescore
  11. 2026-07-19 14:28 UTCEPSS rescore
  12. 2026-07-19 02:26 UTCEPSS rescore
  13. 2026-07-19 02:26 UTCEPSS rescore
  14. 2026-07-18 10:00 UTCEPSS rescore
  15. 2026-07-18 10:00 UTCEPSS rescore
  16. 2026-07-16 16:59 UTCEPSS rescore
  17. 2026-07-16 16:59 UTCEPSS rescore
  18. 2026-07-15 16:54 UTCEPSS rescore
  19. 2026-07-15 16:54 UTCEPSS rescore
  20. 2026-07-15 01:56 UTCEPSS rescore
  21. 2026-07-13 22:26 UTCEPSS rescore
  22. 2026-07-13 06:09 UTCEPSS rescore
  23. 2026-07-12 05:43 UTCEPSS rescore
  24. 2026-07-12 05:43 UTCEPSS rescore
  25. 2026-07-11 08:24 UTCEPSS rescore
Show 75 more
  1. 2026-07-09 19:06 UTCEPSS rescore
  2. 2026-07-08 15:10 UTCEPSS rescore
  3. 2026-07-08 00:27 UTCOSV refresh
  4. 2026-07-07 13:42 UTCEPSS rescore
  5. 2026-07-06 16:24 UTCEPSS rescore
  6. 2026-07-06 16:24 UTCEPSS rescore
  7. 2026-07-06 02:20 UTCEPSS rescore
  8. 2026-07-06 02:20 UTCEPSS rescore
  9. 2026-07-05 02:27 UTCEPSS rescore
  10. 2026-07-04 06:28 UTCEPSS rescore
  11. 2026-07-01 15:02 UTCEPSS rescore
  12. 2026-06-30 23:19 UTCEPSS rescore
  13. 2026-06-30 23:19 UTCEPSS rescore
  14. 2026-06-28 14:04 UTCEPSS rescore
  15. 2026-06-28 04:53 UTCEPSS rescore
  16. 2026-06-27 03:05 UTCEPSS rescore
  17. 2026-06-25 13:47 UTCEPSS rescore
  18. 2026-06-24 14:02 UTCEPSS rescore
  19. 2026-06-23 21:30 UTCEPSS rescore
  20. 2026-06-22 14:23 UTCEPSS rescore
  21. 2026-06-21 01:57 UTCEPSS rescore
  22. 2026-06-21 01:57 UTCEPSS rescore
  23. 2026-06-19 12:25 UTCOSV refresh
  24. 2026-06-18 17:50 UTCEPSS rescore
  25. 2026-06-18 17:50 UTCEPSS rescore
  26. 2026-06-17 17:50 UTCEPSS rescore
  27. 2026-06-17 17:50 UTCEPSS rescore
  28. 2026-06-16 17:50 UTCEPSS rescore
  29. 2026-06-15 17:45 UTCEPSS rescore
  30. 2026-06-14 23:14 UTCEPSS rescore
  31. 2026-06-14 23:14 UTCEPSS rescore
  32. 2026-06-12 23:09 UTCEPSS rescore
  33. 2026-06-11 13:57 UTCEPSS rescore
  34. 2026-06-08 14:14 UTCEPSS rescore
  35. 2026-06-07 15:22 UTCEPSS rescore
  36. 2026-06-07 15:22 UTCEPSS rescore
  37. 2026-06-06 13:45 UTCEPSS rescore
  38. 2026-06-06 13:45 UTCEPSS rescore
  39. 2026-06-05 22:44 UTCEPSS rescore
  40. 2026-06-04 13:10 UTCEPSS rescore
  41. 2026-06-04 13:10 UTCEPSS rescore
  42. 2026-06-02 20:10 UTCEPSS rescore
  43. 2026-06-01 13:49 UTCEPSS rescore
  44. 2026-06-01 13:49 UTCEPSS rescore
  45. 2026-05-31 22:28 UTCEPSS rescore
  46. 2026-05-31 22:28 UTCEPSS rescore
  47. 2026-05-31 00:14 UTCEPSS rescore
  48. 2026-05-30 20:23 UTCOSV refresh
  49. 2026-05-29 13:41 UTCEPSS rescore
  50. 2026-05-28 13:42 UTCEPSS rescore
  51. 2026-05-28 13:42 UTCEPSS rescore
  52. 2026-05-27 13:38 UTCEPSS rescore
  53. 2026-05-27 13:38 UTCEPSS rescore
  54. 2026-05-26 13:42 UTCEPSS rescore
  55. 2026-05-26 13:42 UTCEPSS rescore
  56. 2026-05-26 07:17 UTCEPSS rescore
  57. 2026-05-24 16:44 UTCEPSS rescore
  58. 2026-05-22 21:15 UTCEPSS rescore
  59. 2026-05-20 22:37 UTCEPSS rescore
  60. 2026-05-20 22:37 UTCEPSS rescore
  61. 2026-05-20 22:37 UTCEPSS rescore
  62. 2026-05-20 11:21 UTCEPSS rescore
  63. 2026-05-20 11:21 UTCEPSS rescore
  64. 2026-05-20 08:16 UTCVendor advisory
  65. 2026-05-20 08:16 UTCGHSA enrichment
  66. 2026-05-20 04:22 UTCVendor advisory
  67. 2026-05-20 04:22 UTCGHSA enrichment
  68. 2026-05-20 00:29 UTCVendor advisory
  69. 2026-05-20 00:29 UTCGHSA enrichment
  70. 2026-05-19 20:36 UTCVendor advisory
  71. 2026-05-19 20:36 UTCGHSA enrichment
  72. 2026-05-19 16:40 UTCVendor advisory
  73. 2026-05-19 16:40 UTCGHSA enrichment
  74. 2026-05-19 12:26 UTCVendor advisory
  75. 2026-05-19 12:26 UTCGHSA enrichment

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-40920✓ verified
    First seen Dec 15, 2016

    Nagios < 4.2.2 - Arbitrary Code Execution

    Open source ↗

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2016-9565?
CVE-2016-9565 is a critical vulnerability published on December 15, 2016. MagpieRSS, as used in the front-end component in Nagios Core before 4.2.2 might allow remote attackers to read or write to arbitrary files by spoofing a crafted response from the Nagios RSS feed server. NOTE: this vulnerability exists because of an incomplete fix for CVE-2008-4796.
When was CVE-2016-9565 disclosed?
CVE-2016-9565 was first published in the National Vulnerability Database on December 15, 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-2016-9565 actively exploited?
CVE-2016-9565 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-9565?
CVE-2016-9565 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-9565?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-9565, 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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