CVE-2001-1097
Status: ModifiedMedium (5)—Exploit
Severity5Medium · CVSS 2.0
Exploitation probability4.32 %higher than 91% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitAvailablePublished on Exploit-DB
Cisco routers and switches running IOS 12.0 through 12.2.1 allows a remote attacker to cause a denial of service via a flood of UDP packets.
CVSS
- Base score
- 5
- Version
- 2.0
- Vector
- AV:N/AC:L/Au:N/C:N/I:N/A:P
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 4.32 %
- Percentile among all scored CVEs
- 91
- Score date
- 10/20/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Public exploits
Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.
- Published on Exploit-DB · Cisco IOS 12 - UDP Denial of Service (7/25/2001)
Affected technologies (1)
CWEs
- NVD-CWE-Other
References
Show 8 references
- http://marc.info/?l=bugtraq&m=99749327219189&w=2
- http://www.securityfocus.com/archive/1/199558
- http://www.securityfocus.com/bid/3096
- https://exchange.xforce.ibmcloud.com/vulnerabilities/6913
- http://marc.info/?l=bugtraq&m=99749327219189&w=2
- http://www.securityfocus.com/archive/1/199558
- http://www.securityfocus.com/bid/3096
- https://exchange.xforce.ibmcloud.com/vulnerabilities/6913
Raw JSON (NVD)
Show
{
"id": "CVE-2001-1097",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 5,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"authentication": "NONE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "NONE"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 10,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2001-07-24T04:00:00.000",
"references": [
{
"url": "http://marc.info/?l=bugtraq&m=99749327219189&w=2",
"source": "cve@mitre.org"
},
{
"url": "http://www.securityfocus.com/archive/1/199558",
"tags": [
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.securityfocus.com/bid/3096",
"tags": [
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/6913",
"source": "cve@mitre.org"
},
{
"url": "http://marc.info/?l=bugtraq&m=99749327219189&w=2",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.securityfocus.com/archive/1/199558",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.securityfocus.com/bid/3096",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/6913",
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Cisco routers and switches running IOS 12.0 through 12.2.1 allows a remote attacker to cause a denial of service via a flood of UDP packets."
}
],
"lastModified": "2026-06-16T21:55:34.877",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ios:12.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8F86F790-6247-42F2-9487-3D60A2842F52"
},
{
"criteria": "cpe:2.3:o:cisco:ios:12.0\\(1\\):*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5CFBBDA3-8A5E-407D-8608-45C1BD56BF58"
},
{
"criteria": "cpe:2.3:o:cisco:ios:12.0\\(2\\):*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "77DDC99D-8B73-452C-94A7-A9A48F2F379B"
},
{
"criteria": "cpe:2.3:o:cisco:ios:12.0\\(3\\):*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FF2207E5-7458-40C5-AEF4-73B271EAB3C4"
},
{
"criteria": "cpe:2.3:o:cisco:ios:12.0\\(4\\):*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1A0D82E1-CCF7-429B-A637-479E839EAE3C"
},
{
"criteria": "cpe:2.3:o:cisco:ios:12.0\\(5\\):*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D5BB7513-C232-4B4F-BE68-972B05086ABD"
},
{
"criteria": "cpe:2.3:o:cisco:ios:12.0\\(6\\):*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "ECCE69A3-41C6-4893-86D4-7F264352C8A9"
},
{
"criteria": "cpe:2.3:o:cisco:ios:12.0\\(7\\)t:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FA654CE6-82C3-43D0-BAED-70E88A740BF1"
},
{
"criteria": "cpe:2.3:o:cisco:ios:12.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1F2F9EC5-EDA2-4C99-BBF1-2F2C92AACE95"
},
{
"criteria": "cpe:2.3:o:cisco:ios:12.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E4BC49F2-3DCB-45F0-9030-13F6415EE178"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}