Detections
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Cisco IOS XE Software Secure Copy Protocol Server DoS (cisco-sa-scp-dos-duAdXtCg)

medium Nessus Plugin ID 305771

Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco IOS-XE Software is affected by a vulnerability.

 - A denial of service (DoS) vulnerability exists in Secure Copy Protocol (SCP) server feature of Cisco IOS XE Software due to improper handling of a malformed SCP request. An authenticated, local attacker can exploit this issue, via issuing a crafted command through SSH, to cause the device to reload unexpectedly, resulting in a DoS condition. (CVE-2026-20083).

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwr59895

See Also

http://www.nessus.org/u?5c072352

http://www.nessus.org/u?b40d902b

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwr59895

Plugin Details

Severity: Medium

ID: 305771

File Name: cisco-sa-scp-dos-duAdXtCg-iosxe.nasl

Version: 1.1

Type: Combined

Family: CISCO

Published: 4/9/2026

Updated: 4/9/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2026-20083

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 3/25/2026

Vulnerability Publication Date: 3/25/2026

Reference Information

CVE: CVE-2026-20083

CWE: 235

CISCO-SA: cisco-sa-scp-dos-duAdXtCg

IAVA: 2026-A-0263

CISCO-BUG-ID: CSCwr59895