No exploitation reported

CVE-2020-16849

No exploitation reported by the sources we read.

Published2020-11-30

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

An issue was discovered on Canon MF237w 06.07 devices. An "Improper Handling of Length Parameter Inconsistency" issue in the IPv4/ICMPv4 component, when handling a packet sent by an unauthenticated network attacker, may expose Sensitive Information.

Timeline

dates in UTC

2020-11-3022:15CVE 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-2020-16849?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-16849?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Canon ir2202n firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Canon ir2204f firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Canon ir2204n firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

25 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

www.canon-europe.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2020-11-30
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-16849?

Is CVE-2020-16849 actively exploited?

Active exploitation of CVE-2020-16849 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-16849?

CVE-2020-16849 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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