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No exploitation reportedFix available

CVE-2018-15373

No exploitation reported by the sources we read.

  • Published2018-10-05
  • WeaknessCWE-399 · CWE-770

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

A vulnerability in the implementation of Cisco Discovery Protocol functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper memory handling by the affected software when the software processes high rates of Cisco Discovery Protocol packets that are sent to a device. An attacker could exploit this vulnerability by sending a high rate of Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition.

Timeline

dates in UTC
  1. 2018-10-0514:29CVE 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-2018-15373?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-15373?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Cisco ios
BranchAffectedFixed in
15.5= 15.5\(3\)s3.16no fix published
Cisco ios xe
BranchAffectedFixed in
15.5= 15.5\(3\)s3.16no fix published

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

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-19-094-03 CISA6 known affected

    Rockwell Automation Stratix 5400/5410/5700/8000/8300 and ArmorStratix 5700

    Allen-Bradley Stratix 8300: All versions prior to 15.2(4)EA7 · Allen-Bradley Stratix 5400: All versions 15.2(6)E0a and prior · Allen-Bradley Stratix 5700: All versions 15.2(6)E0a and prior · +3 more

Full record on NVD

Fix

  1. Vendor fix CISA ICSA-19-094-03 · 6 productsFRN 15.2(6)E2a: Allen-Bradley ArmorStratix 5700
  2. Mitigation from the vendor CISA ICSA-19-094-03 · 6 productsFRN 15.2(6)E2a: Allen-Bradley Stratix 5400
  3. Mitigation from the vendor CISA ICSA-19-094-03 · 6 productsFRN 15.2(6)E2a: Allen-Bradley Stratix 5410
  4. Mitigation from the vendor CISA ICSA-19-094-03 · 6 productsFRN 15.2(6)E2a: Allen-Bradley Stratix 5700
  5. Mitigation from the vendor CISA ICSA-19-094-03 · 6 productsFRN 15.2(6)E2a: Allen-Bradley Stratix 8000
  6. Mitigation from the vendor CISA ICSA-19-094-03 · 6 productsFRN 15.2(4)EA7: Allen-Bradley Stratix 8300

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

  • CISA-ADPSSVC decisionnone2024-11-25
  • OpenCVESSVC decisionnone—
  • NVDCVSS 3.07.4read 2026-10-23
  • NVDCVSS 2.06.1read 2026-10-23
  • CNAweakness (CWE)CWE-399read 2026-10-23
  • NVDweakness (CWE)CWE-770read 2026-10-23
  • FIRST EPSSEPSS score0.7 %2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Published
2018-10-05
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2018-15373?

A vulnerability in the implementation of Cisco Discovery Protocol functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper memory handling by the affected software when the software processes high rates of Cisco Discovery Protocol packets that are sent to a device. An attacker could exploit this vulnerability by sending a high rate of Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition.

Is CVE-2018-15373 actively exploited?

Active exploitation of CVE-2018-15373 has not been confirmed. Its EPSS score was 0.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-15373?

CVE-2018-15373 has a CVSS v3 base score of 7.4 (HIGH severity), with vector string CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

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