CVE-2021-1619
No exploitation reported by the sources we read.
- Published2021-09-23
- WeaknessCWE-824 · CWE-908
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « 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 authentication, authorization, and accounting (AAA) function of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass NETCONF or RESTCONF authentication and do either of the following: Install, manipulate, or delete the configuration of an affected device Cause memory corruption that results in a denial of service (DoS) on an affected device This vulnerability is due to an uninitialized variable. An attacker could exploit this vulnerability by sending a series of NETCONF or RESTCONF requests to an affected device. A successful exploit could allow the attacker to use NETCONF or RESTCONF to install, manipulate, or delete the configuration of a network device or to corrupt memory on the device, resulting a DoS.
Timeline
dates in UTC- 2021-09-2303:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-1619?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-1619?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 16.3 | = 16.3.1 | no fix published | NVD |
| 16.3 | = 16.3.1a | no fix published | NVD |
| 16.3 | = 16.3.2 | no fix published | NVD |
| 16.3 | = 16.3.3 | no fix published | NVD |
| 16.3 | = 16.3.4 | no fix published | NVD |
| 16.3 | = 16.3.5 | no fix published | NVD |
| 16.3 | = 16.3.5b | no fix published | NVD |
| 16.3 | = 16.3.6 | no fix published | NVD |
| 16.3 | = 16.3.7 | no fix published | NVD |
| 16.3 | = 16.3.8 | no fix published | NVD |
| 16.3 | = 16.3.9 | no fix published | NVD |
| 16.3 | = 16.3.10 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | = routers | no fix published | NVD |
143 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- tools.cisco.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Published
- 2021-09-23
- Last Modified
- 2026-06-17
- NVD status
- Undergoing Analysis
Frequently asked questions
What is CVE-2021-1619?
Is CVE-2021-1619 actively exploited?
What is the CVSS score for CVE-2021-1619?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.