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No exploitation reported

CVE-2015-6289

No exploitation reported by the sources we read.

  • Published2016-06-23
  • WeaknessCWE-399

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Cisco IOS 15.5(3)M on Integrated Services Router (ISR) 800, 819, and 829 devices allows remote attackers to cause a denial of service (memory consumption) via crafted TCP packets on the SSH port, aka Bug ID CSCuu13476.

Timeline

dates in UTC
  1. 2016-06-2300:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-6289?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-6289?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Cisco iosversion to verify
BranchAffectedFixed in
15.5= 15.5\(3\)mno fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.07.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-399read 2026-10-23
  • FIRST EPSSEPSS score4.4 %2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2016-06-23
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2015-6289?

Cisco IOS 15.5(3)M on Integrated Services Router (ISR) 800, 819, and 829 devices allows remote attackers to cause a denial of service (memory consumption) via crafted TCP packets on the SSH port, aka Bug ID CSCuu13476.

Is CVE-2015-6289 actively exploited?

Active exploitation of CVE-2015-6289 has not been confirmed. Its EPSS score was 4.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2015-6289?

CVE-2015-6289 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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