CVE-2025-20171

highpriority · track · 0EPSS 0.008 · 56 %ileDEEUNLRUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.78% (56th) EPSS
CVSS 7.7 · high
Is it mine?
4,835 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A vulnerability in the SNMP subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper error handling when parsing SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.  This vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMP v2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMP v3, the attacker must have valid SNMP user credentials for the affected system.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

02

cvss

Technical severity, 0–10. One row per scoring source.

7.7
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.7highAV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU
v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU
v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 3.1 · impact 4
v3.17.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · NCSC-NL NL
v3.17.7highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-248USCWE-805USCWE-805US
05

affected products (4,835)

Products and version ranges known to be affected.

showing 20 of 4,835
06

advisories (3)

Vendor and ecosystem advisories describing this.

  • NCSC-2025-0043Kwetsbaarheden verholpen in Cisco IOS, IOS XE en IOS XR SoftwareNL2025-02-07csaf · ncsc_nlNL

    Cisco heeft meerdere kwetsbaarheden verholpen in IOS, IOS XE en IOS XR Software.

  • WID-SEC-W-2025-0286Cisco IOS, IOS XE and IOS XR: Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2025-02-05csaf · cert_bundDE

    Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Cisco IOS, Cisco IOS XE und Cisco IOS XR ausnutzen, um einen Denial of Service Angriff durchzuführen.

  • cisco-sa-snmp-dos-sdxnSUcWCisco IOS, IOS XE, and IOS XR Software SNMP Denial of Service Vulnerabilities2025-02-05csaf · cisco_csafUS

    Multiple vulnerabilities in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details ["#details"] section of this advisory. Cisco plans to release software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. There are mitigations that address these vulnerabilities.

07

also known as (4)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundncsc_nlcisco_csafNVDCVE.orgMITRE
published 2025-02-05modified 2026-06-17
09

references (4)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan