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No exploitation reportedFix available

CVE-2021-1442

No exploitation reported by the sources we read.

  • Published2021-03-24
  • WeaknessCWE-532

Am I 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 a diagnostic command for the Plug-and-Play (PnP) subsystem of Cisco IOS XE Software could allow an authenticated, local attacker to elevate privileges to the level of an Administrator user (level 15) on an affected device. The vulnerability is due to insufficient protection of sensitive information. An attacker with low privileges could exploit this vulnerability by issuing the diagnostic CLI show pnp profile when a specific PnP listener is enabled on the device. A successful exploit could allow the attacker to obtain a privileged authentication token. This token can be used to send crafted PnP messages and execute privileged commands on the targeted system.

Timeline

dates in UTC
  1. 2021-03-2420:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-1442?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-1442?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Cisco ios xe
BranchAffectedFixed in
3.6= 3.6.3eno fix published
3.6= 3.6.4eno fix published
3.6= 3.6.5aeno fix published
3.6= 3.6.5beno fix published
3.6= 3.6.5eno fix published
3.6= 3.6.6eno fix published
3.6= 3.6.7aeno fix published
3.6= 3.6.7beno fix published
3.6= 3.6.7eno fix published
3.6= 3.6.8eno fix published
3.6= 3.6.9aeno fix published
3.6= 3.6.9eno fix published

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 CISA5 known affected

    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

Full record on NVD

Fix

  1. 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.
  2. 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.
  3. Mitigation from the vendor CISA ICSA-21-110-02 · 5 productsStratix 8300: Migrate to contemporary solution.
  4. 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.
  5. Mitigation from the vendor CISA ICSA-21-110-02 · 5 productsPlease see the Rockwell Automation security advisory for more detailed information.
  6. 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

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2024-11-08
  • OpenCVESSVC decisionnone—
  • NVDCVSS 3.17.8read 2026-10-23
  • CNACVSS 3.07read 2026-10-23
  • NVDCVSS 2.06.9read 2026-10-23
  • CNAweakness (CWE)CWE-532read 2026-10-23
  • FIRST EPSSEPSS score0.2 %2026-10-22

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-2021-1442?

A vulnerability in a diagnostic command for the Plug-and-Play (PnP) subsystem of Cisco IOS XE Software could allow an authenticated, local attacker to elevate privileges to the level of an Administrator user (level 15) on an affected device. The vulnerability is due to insufficient protection of sensitive information. An attacker with low privileges could exploit this vulnerability by issuing the diagnostic CLI show pnp profile when a specific PnP listener is enabled on the device. A successful exploit could allow the attacker to obtain a privileged authentication token. This token can be used to send crafted PnP messages and execute privileged commands on the targeted system.

Is CVE-2021-1442 actively exploited?

Active exploitation of CVE-2021-1442 has not been confirmed. Its EPSS score was 0.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-1442?

CVE-2021-1442 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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