CVE-2019-1758 json
Cisco IOS Software Catalyst 6500 Series 802.1x Authentication Bypass Vulnerability
published 2019-03-28 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-10315
- cvss
- 4.7
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
A vulnerability in 802.1x function of Cisco IOS Software on the Catalyst 6500 Series Switches could allow an unauthenticated, adjacent attacker to access the network prior to authentication. The vulnerability is due to how the 802.1x packets are handled in the process path. An attacker could exploit this vulnerability by attempting to connect to the network on an 802.1x configured port. A successful exploit could allow the attacker to intermittently obtain access to the network.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 23 mo ago
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 4.7 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N |
| NVD | 3.0 | 4.3 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVD | 2.0 | 3.3 | AV:A/AC:L/Au:N/C:N/I:P/A:N |
Affected products
- Cisco Cisco IOS Software
Classification
- Weakness
-
- CWE-287 Improper Authentication
- Technology feeds
References
-
tools.cisco.com
/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-c6500
vendor-advisory, patch
-
securityfocus.com
/bid/107616
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2019-1758
- NVD CVE-2019-1758
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