Threats / Cisco / CVE-2004-1464
CVE-2004-1464
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Cisco IOS vulnerability
Cisco IOS contains an unspecified vulnerability that blocks telnet, reverse telnet, RSH, SSH, and HTTP access to affected devices, causing denial of service.
Verdict
Today item — known-exploited.
An attacker can trigger a denial-of-service condition by exploiting an unspecified flaw in Cisco IOS, rendering remote management interfaces inaccessible and preventing legitimate administrative access to network devices.
CISA KEV Yes · 2023-05-194EPSS 0.05133 (verify live)5CVSS 5.9 (CISA)3CISA SSVC Exploitation: active · Automatable: no · Impact: partial3
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
2 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-05-19).
Probability (EPSS)
EPSS 0.05133 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H) · Affected: Cisco, IOS. Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: no · Technical Impact: partialCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 6669 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious input or trigger a specific condition in Cisco IOS to activate the vulnerability.
Business
Network administrators lose remote access to critical infrastructure devices, disrupting operational visibility and control.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I block all remote management protocols including SSH, telnet, and HTTP on the target device.
Business
Incident response and remediation efforts are delayed, extending downtime and increasing business impact.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05