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CVE-2022-20937

A vulnerability in a feature that monitors RADIUS requests on Cisco Identity Services Engine (ISE) Software could allow an…

Medium5.3EPSS 0.99%
Published
Updated
Reserved
Assigned by
cisco

Description

A vulnerability in a feature that monitors RADIUS requests on Cisco Identity Services Engine (ISE) Software could allow an unauthenticated, remote attacker to negatively affect the performance of an affected device. This vulnerability is due to insufficient management of system resources. An attacker could exploit this vulnerability by taking actions that cause Cisco ISE Software to receive specific RADIUS traffic. A successful and sustained exploit of this vulnerability could allow the attacker to cause reduced performance of the affected device, resulting in significant delays to RADIUS authentications. There are workarounds that address this vulnerability.

Timeline

  1. ID reserved

    By cisco

  2. · 12 months later

    Published

  3. · 21 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-2022-20937, by who scored it
Scored byCVSSScoreVector
ciscoCNA (assigner)3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVDNVD · Modified3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS (exploitation in 30 days)
0.99% · top 37% 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: Medium 5.3.

Weakness

Affected products

  • Cisco · Cisco Identity Services Engine Software

    • affected 2.6.0
    • affected 2.6.0 p1
    • affected 2.6.0 p2
    • affected 2.6.0 p3
    • affected 2.6.0 p5
    • affected 2.6.0 p6
    • affected 2.6.0 p7
    • affected 2.6.0 p8
    • affected 2.6.0 p9
    • affected 2.6.0 p10
    • affected 2.6.0 p11
    • affected 2.6.0 p12
    • affected 2.7.0
    • affected 2.7.0 p1
    • affected 2.7.0 p2
    • affected 2.7.0 p3
    • affected 2.7.0 p4
    • affected 2.7.0 p5
    • affected 2.7.0 p6
    • affected 2.7.0 p7
    • affected 3.0.0
    • affected 3.0.0 p1
    • affected 3.0.0 p2
    • affected 3.0.0 p3
    • affected 3.0.0 p4
    • affected 3.0.0 p5
    • affected 3.1.0
    • affected 3.1.0 p1

What to do

Exploitation: The Cisco PSIRT is not aware of any public announcements or 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-2022-20937 badge
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Record last updated .