CVE-2021-1392
No exploitation reported by the sources we read.
- Published2021-03-24
- WeaknessCWE-522
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 CLI command permissions of Cisco IOS and Cisco IOS XE Software could allow an authenticated, local attacker to retrieve the password for Common Industrial Protocol (CIP) and then remotely configure the device as an administrative user. This vulnerability exists because incorrect permissions are associated with the show cip security CLI command. An attacker could exploit this vulnerability by issuing the command to retrieve the password for CIP on an affected device. A successful exploit could allow the attacker to reconfigure the device.
Timeline
dates in UTC- 2021-03-2420:15CVE 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-2021-1392?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-1392?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 |
|---|---|---|---|
| 15.0 | = 15.0\(1\)ey | no fix published | NVD |
| 15.0 | = 15.0\(1\)ey1 | no fix published | NVD |
| 15.0 | = 15.0\(1\)ey2 | no fix published | NVD |
| 15.1 | = 15.1\(3\)svs | no fix published | NVD |
| 15.1 | = 15.1\(3\)svt1 | no fix published | NVD |
| 15.2 | = 15.2\(1\)ey | no fix published | NVD |
| 15.2 | = 15.2\(2\)e | no fix published | NVD |
| 15.2 | = 15.2\(2\)e1 | no fix published | NVD |
| 15.2 | = 15.2\(2\)e2 | no fix published | NVD |
| 15.2 | = 15.2\(2\)e3 | no fix published | NVD |
| 15.2 | = 15.2\(2\)e4 | no fix published | NVD |
| 15.2 | = 15.2\(2\)e5 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 3.3 | = 3.3.0xo | no fix published | NVD |
| 3.3 | = 3.3.1xo | no fix published | NVD |
| 3.3 | = 3.3.2xo | no fix published | NVD |
| 3.6 | = 3.6.5be | no fix published | NVD |
| 3.7 | = 3.7.4e | no fix published | NVD |
| 3.7 | = 3.7.5e | no fix published | NVD |
| 16.9 | = 16.9.1 | no fix published | NVD |
| 16.9 | = 16.9.1d | no fix published | NVD |
| 16.10 | = 16.10.1 | no fix published | NVD |
| 16.10 | = 16.10.1e | no fix published | NVD |
| 16.11 | = 16.11.1 | no fix published | NVD |
| 16.11 | = 16.11.1a | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
ICSA-21-110-02_Rockwell Automation Stratix Switches
Stratix 5400: Versions 15.2(7)E3 and earlier · Stratix 5700: Versions 15.2(7)E3 and earlier · Stratix 5410: Versions 15.2(7)E3 and earlier · +2 more
Fix
- Vendor fix CISA ICSA-21-110-02 · 5 productsStratix 5800: Apply Version 17.04.01 or later. If possible, disable DECnet protocol completely or on select interfaces.
- Mitigation from the vendor CISA ICSA-21-110-02 · 5 productsRockwell Automation encourages users of the affected Stratix devices to update to an available firmware revision that addresses the associated risk.
- Mitigation from the vendor CISA ICSA-21-110-02 · 5 productsStratix 8300: Migrate to contemporary solution.
- Mitigation from the vendor CISA ICSA-21-110-02 · 5 productsAll versions, including Stratix 8000, Stratix 5700, Stratix 5410, Stratix 5400: Confirm the least-privilege user principle is followed, and user account access to is only granted with a minimum number of rights as needed.
- Mitigation from the vendor CISA ICSA-21-110-02 · 5 productsPlease see the Rockwell Automation security advisory for more detailed information.
- Mitigation from the vendor CISA ICSA-21-110-02 · 5 productsWhere a fix is not yet available, users who are unable to update are directed towards the risk mitigation strategies provided below, and are encouraged, when possible, to apply general security guidelines to employ multiple strategies simultaneously.
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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2021-03-24
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-1392?
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What is the CVSS score for CVE-2021-1392?
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