Trending
CVE-2021-40113

CVE detail

CVE-2021-40113

Multiple vulnerabilities in the web-based management interface of the Cisco Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT) could allow an unauthenticated, remote attacker to perform the following actions: Log in with a default credential if the Telnet protocol is enabled Perform command injection Modify the configuration For more information about these vulnerabilities, see the Details section of this advisory.

CVSS 10.0 · CriticalBuzz score 11.9

Buzz score

Why this CVE is surfacing

Buzz score total 11.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 6.9 · diversity 5.0 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

6.9

1 evidence mentions in the snapshot

Diversity score

5.0

1 sources across 1 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 0; within the 30d window
Peak daily: 0; highest bucket

Evidence

Source links by recency

Newest mentions first

1 source links · newest first

Cisco Plugs Critical Holes in Catalyst PON Enterprise SwitchesSecurityWeek
Enterprise networking giant Cisco has released patches for multiple vulnerabilities across its product portfolio, including critical security defects in Catalyst Passive Optical Network (PON) series switches and the Policy Suite product.
newswww.securityweek.comNov 4, 2021, 7:03 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

Similar CVEs

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External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2021-40113.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:h:cisco:catalyst_pon_switch_cgp-ont-1pSearch this product on Shodan
cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-1p_firmwareSearch this product on Shodan
cpe:2.3:h:cisco:catalyst_pon_switch_cgp-ont-4pSearch this product on Shodan
cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4p_firmwareSearch this product on Shodan
cpe:2.3:h:cisco:catalyst_pon_switch_cgp-ont-4pvSearch this product on Shodan
cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4pv_firmwareSearch this product on Shodan
cpe:2.3:h:cisco:catalyst_pon_switch_cgp-ont-4pvcSearch this product on Shodan
cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4pvc_firmwareSearch this product on Shodan
cpe:2.3:h:cisco:catalyst_pon_switch_cgp-ont-4tvcwSearch this product on Shodan
cpe:2.3:o:cisco:catalyst_pon_switch_cgp-ont-4tvcw_firmwareSearch this product on Shodan

Exact CVE query

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Shodan's exact vuln: filter is separate from the product searches above and requires an eligible paid Shodan plan.

vuln:CVE-2021-40113Search this CVE on Shodan

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Metadata

Canonical fields

NVD status

Unavailable

Published

Nov 4, 2021

Modified

Jun 17, 2026

Official record

Authoritative NVD record

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE IDs

Vendor classifications

How this vector reads

CVSS 3.1 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Network. The vulnerable system can be reached across network boundaries.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Privileges Required (PR): None. The attacker needs no privileges on the vulnerable system.
User Interaction (UI): None. Exploitation does not require another user to act.
Scope (S): Changed. Impacts can cross into a different security authority.
Confidentiality Impact (C): High. There is a total or serious impact to this security property.
Integrity Impact (I): High. There is a total or serious impact to this security property.
Availability Impact (A): High. There is a total or serious impact to this security property.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses