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CVE-2022-20968

A vulnerability in the Cisco Discovery Protocol processing feature of Cisco IP Phone 7800 and 8800 Series firmware could allow an…

High8.1EPSS 6.4%
Published
Updated
Reserved
Assigned by
cisco

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

  1. ID reserved

    By cisco

  2. · 13 months later

    Published

  3. · 20 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2022-20968, by who scored it
Scored byCVSSScoreVector
ciscoCNA (assigner)3.1High8.1CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
NVDNVD · Modified3.1High8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
6.4% · top 6.3% of all CVEs (7 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.

Weakness

Affected products

  • Cisco · Cisco Session Initiation Protocol (SIP) Software

    • affected 9.3(4) 3rd Party
    • affected 9.3(4)SR3 3rd Party
    • affected 9.3(4)SR1 3rd Party
    • affected 9.3(4)SR2 3rd Party
    • affected 11.5(1)
    • affected 11.7(1)
    • affected 11.0(0.7) MPP
    • affected 11.0(1) MPP
    • affected 11.0(1)
    • affected 11.5(1)SR1
    • affected 11-0-1MSR1-1
    • affected 10.4(1) 3rd Party
    • affected 10.3(1.11) 3rd Party
    • affected 10.2(2)
    • affected 10.2(1)SR1
    • affected 10.1(1.9)
    • affected 10.1(1)SR2
    • affected 10.2(1)
    • affected 10.1(1)SR1
    • affected 10.4(1)SR2 3rd Party
    • affected 10.3(1)
    • affected 10.3(1)SR4b
    • affected 10.3(1)SR5
    • affected 10.3(1.9) 3rd Party
    • affected 10.3(2)
    • affected 10.3(1)SR4
    • affected 10.3(1)SR2
    • affected 10.3(1)SR3
    • affected 10.3(1)SR1
    • affected 12.6(1)
    • affected 12.1(1)
    • affected 12.5(1)SR1
    • affected 12.5(1)SR2
    • affected 12.5(1)
    • affected 12.5(1)SR3
    • affected 12.6(1)SR1
    • affected 12.7(1)
    • affected 12.1(1)SR1
    • affected 12.0(1)
    • affected 12.0(1)SR2
    • and 14 more

What to do

Exploitation: The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerability described in this advisory and that this vulnerability has been publicly discussed. The Cisco PSIRT is not aware of any malicious use of the vulnerability that is described in this advisory.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

CVE-2022-20968 badge
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Record last updated .