No exploitation reported

CVE-2022-20968

No exploitation reported by the sources we read.

Published2022-12-12
WeaknessCWE-787

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 the Cisco Discovery Protocol processing feature of Cisco IP Phone 7800 and 8800 Series firmware could allow an unauthenticated, adjacent attacker to cause a stack overflow on an affected device. This vulnerability is due to insufficient input validation of received Cisco Discovery Protocol packets. An attacker could exploit this vulnerability by sending crafted Cisco Discovery Protocol traffic to an affected device. A successful exploit could allow the attacker to cause a stack overflow, resulting in possible remote code execution or a denial of service (DoS) condition on an affected device.

Timeline

dates in UTC

2022-12-1209:15CVE 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-2022-20968?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-20968?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Cisco ip phone 7811 firmwareversion to verify

Branch	Affected	Fixed in	Source
9.3	= 9.3\(3\)	no fix published	NVD
9.3	= 9.3\(4\)	no fix published	NVD
9.3	= 9.3\(4\)sr1	no fix published	NVD
9.3	= 9.3\(4\)sr2	no fix published	NVD
9.3	= 9.3\(4\)sr3	no fix published	NVD
10.1	= 10.1\(1\)sr1	no fix published	NVD
10.1	= 10.1\(1\)sr2	no fix published	NVD
10.1	= 10.1\(1.9\)	no fix published	NVD
10.2	= 10.2\(1\)	no fix published	NVD
10.2	= 10.2\(1\)sr1	no fix published	NVD
10.2	= 10.2\(2\)	no fix published	NVD
10.3	= 10.3\(1\)	no fix published	NVD

Cisco ip phone 7821 firmwareversion to verify

Branch	Affected	Fixed in	Source
9.3	= 9.3\(3\)	no fix published	NVD
9.3	= 9.3\(4\)	no fix published	NVD
9.3	= 9.3\(4\)sr1	no fix published	NVD
9.3	= 9.3\(4\)sr2	no fix published	NVD
9.3	= 9.3\(4\)sr3	no fix published	NVD
10.1	= 10.1\(1\)sr1	no fix published	NVD
10.1	= 10.1\(1\)sr2	no fix published	NVD
10.1	= 10.1\(1.9\)	no fix published	NVD
10.2	= 10.2\(1\)	no fix published	NVD
10.2	= 10.2\(1\)sr1	no fix published	NVD
10.2	= 10.2\(2\)	no fix published	NVD
10.3	= 10.3\(1\)	no fix published	NVD

Cisco ip phone 7832 firmwareversion to verify

Branch	Affected	Fixed in	Source
9.3	= 9.3\(3\)	no fix published	NVD
9.3	= 9.3\(4\)	no fix published	NVD
9.3	= 9.3\(4\)sr1	no fix published	NVD
9.3	= 9.3\(4\)sr2	no fix published	NVD
9.3	= 9.3\(4\)sr3	no fix published	NVD
10.1	= 10.1\(1\)sr1	no fix published	NVD
10.1	= 10.1\(1\)sr2	no fix published	NVD
10.1	= 10.1\(1.9\)	no fix published	NVD
10.2	= 10.2\(1\)	no fix published	NVD
10.2	= 10.2\(1\)sr1	no fix published	NVD
10.2	= 10.2\(2\)	no fix published	NVD
10.3	= 10.3\(1\)	no fix published	NVD

7 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

No fix published by the sources we read yet. NVD record

Detection

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

Sources

CNACVSS 3.18.1read 2026-10-23
NVDCVSS 3.18.8read 2026-10-23
CNAweakness (CWE)CWE-787read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score6.4 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2022-12-12
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-20968?

Is CVE-2022-20968 actively exploited?

Active exploitation of CVE-2022-20968 has not been confirmed. Its EPSS score was 6.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-20968?

CVE-2022-20968 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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