Vulnerability in Cisco iOS
CVE-2021-1391
A vulnerability in the dragonite debugger of Cisco IOS XE Software could allow an authenticated, local attacker to escalate from privilege level 15 to root privilege. The vulnerability is due to the presence of development testing and verification scripts that remained on the device. An attacker could exploit this vulnerability by bypassing the consent token mechanism with the residual scripts on the affected device. A successful exploit could allow the attacker to escalate from privilege level 15 to root privilege.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Cisco iOS
- Cisco iOS — versions 15.2(5)ex, 15.2(7)e2, 15.1(3)svr3
- Cisco iOS Xe — versions 3.9.0e, 3.9.1e, 3.9.2be
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-FSM-Y… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-1391?
- CVE-2021-1391 is a medium-severity vulnerability in Cisco iOS, classified under Active Debug Code. CVSS score: 5.1/10. Published 2021-03-24.
- How severe is CVE-2021-1391?
- Medium severity. CVSS v3 base score is 5.1 out of 10.