CVE-2025-20176

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.

Published: 2025-02-05 Last update: 2025-07-03 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-20176 is rated Moderate Risk (56.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.73%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-20176

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-09 0.95% 0.73% -0.22%
2 2026-05-09 0.31% 0.95% +0.64%
3 2026-03-16 — 0.31% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-20176

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.7 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.1 4.0 [email protected]

Weakness enumeration for CVE-2025-20176

Affected software / configurations for CVE-2025-20176

Vendor Product Version Raw CPE
cisco ios 15.0\(1\)sy cpe:2.3:o:cisco:ios:15.0\(1\)sy:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy1 cpe:2.3:o:cisco:ios:15.0\(1\)sy1:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy2 cpe:2.3:o:cisco:ios:15.0\(1\)sy2:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy3 cpe:2.3:o:cisco:ios:15.0\(1\)sy3:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy4 cpe:2.3:o:cisco:ios:15.0\(1\)sy4:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy5 cpe:2.3:o:cisco:ios:15.0\(1\)sy5:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy6 cpe:2.3:o:cisco:ios:15.0\(1\)sy6:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy7 cpe:2.3:o:cisco:ios:15.0\(1\)sy7:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy7a cpe:2.3:o:cisco:ios:15.0\(1\)sy7a:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy8 cpe:2.3:o:cisco:ios:15.0\(1\)sy8:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy9 cpe:2.3:o:cisco:ios:15.0\(1\)sy9:*:*:*:*:*:*:*
cisco ios 15.0\(1\)sy10 cpe:2.3:o:cisco:ios:15.0\(1\)sy10:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ea cpe:2.3:o:cisco:ios:15.0\(2\)ea:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ea1 cpe:2.3:o:cisco:ios:15.0\(2\)ea1:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ej cpe:2.3:o:cisco:ios:15.0\(2\)ej:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ej1 cpe:2.3:o:cisco:ios:15.0\(2\)ej1:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ek cpe:2.3:o:cisco:ios:15.0\(2\)ek:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ek1 cpe:2.3:o:cisco:ios:15.0\(2\)ek1:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex cpe:2.3:o:cisco:ios:15.0\(2\)ex:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex1 cpe:2.3:o:cisco:ios:15.0\(2\)ex1:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex2 cpe:2.3:o:cisco:ios:15.0\(2\)ex2:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex3 cpe:2.3:o:cisco:ios:15.0\(2\)ex3:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex4 cpe:2.3:o:cisco:ios:15.0\(2\)ex4:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex5 cpe:2.3:o:cisco:ios:15.0\(2\)ex5:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex8 cpe:2.3:o:cisco:ios:15.0\(2\)ex8:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex10 cpe:2.3:o:cisco:ios:15.0\(2\)ex10:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex11 cpe:2.3:o:cisco:ios:15.0\(2\)ex11:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex12 cpe:2.3:o:cisco:ios:15.0\(2\)ex12:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ex13 cpe:2.3:o:cisco:ios:15.0\(2\)ex13:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ey cpe:2.3:o:cisco:ios:15.0\(2\)ey:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ey1 cpe:2.3:o:cisco:ios:15.0\(2\)ey1:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ey2 cpe:2.3:o:cisco:ios:15.0\(2\)ey2:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ey3 cpe:2.3:o:cisco:ios:15.0\(2\)ey3:*:*:*:*:*:*:*
cisco ios 15.0\(2\)ez cpe:2.3:o:cisco:ios:15.0\(2\)ez:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se cpe:2.3:o:cisco:ios:15.0\(2\)se:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se1 cpe:2.3:o:cisco:ios:15.0\(2\)se1:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se2 cpe:2.3:o:cisco:ios:15.0\(2\)se2:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se3 cpe:2.3:o:cisco:ios:15.0\(2\)se3:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se4 cpe:2.3:o:cisco:ios:15.0\(2\)se4:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se5 cpe:2.3:o:cisco:ios:15.0\(2\)se5:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se6 cpe:2.3:o:cisco:ios:15.0\(2\)se6:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se7 cpe:2.3:o:cisco:ios:15.0\(2\)se7:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se8 cpe:2.3:o:cisco:ios:15.0\(2\)se8:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se9 cpe:2.3:o:cisco:ios:15.0\(2\)se9:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se10 cpe:2.3:o:cisco:ios:15.0\(2\)se10:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se10a cpe:2.3:o:cisco:ios:15.0\(2\)se10a:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se11 cpe:2.3:o:cisco:ios:15.0\(2\)se11:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se12 cpe:2.3:o:cisco:ios:15.0\(2\)se12:*:*:*:*:*:*:*
cisco ios 15.0\(2\)se13 cpe:2.3:o:cisco:ios:15.0\(2\)se13:*:*:*:*:*:*:*
cisco ios 15.0\(2a\)ex5 cpe:2.3:o:cisco:ios:15.0\(2a\)ex5:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy cpe:2.3:o:cisco:ios:15.1\(1\)sy:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy1 cpe:2.3:o:cisco:ios:15.1\(1\)sy1:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy2 cpe:2.3:o:cisco:ios:15.1\(1\)sy2:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy3 cpe:2.3:o:cisco:ios:15.1\(1\)sy3:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy4 cpe:2.3:o:cisco:ios:15.1\(1\)sy4:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy5 cpe:2.3:o:cisco:ios:15.1\(1\)sy5:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy6 cpe:2.3:o:cisco:ios:15.1\(1\)sy6:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy cpe:2.3:o:cisco:ios:15.1\(2\)sy:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy1 cpe:2.3:o:cisco:ios:15.1\(2\)sy1:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy2 cpe:2.3:o:cisco:ios:15.1\(2\)sy2:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy3 cpe:2.3:o:cisco:ios:15.1\(2\)sy3:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy4 cpe:2.3:o:cisco:ios:15.1\(2\)sy4:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy4a cpe:2.3:o:cisco:ios:15.1\(2\)sy4a:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy5 cpe:2.3:o:cisco:ios:15.1\(2\)sy5:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy6 cpe:2.3:o:cisco:ios:15.1\(2\)sy6:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy7 cpe:2.3:o:cisco:ios:15.1\(2\)sy7:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy8 cpe:2.3:o:cisco:ios:15.1\(2\)sy8:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy9 cpe:2.3:o:cisco:ios:15.1\(2\)sy9:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy10 cpe:2.3:o:cisco:ios:15.1\(2\)sy10:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy11 cpe:2.3:o:cisco:ios:15.1\(2\)sy11:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy12 cpe:2.3:o:cisco:ios:15.1\(2\)sy12:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy13 cpe:2.3:o:cisco:ios:15.1\(2\)sy13:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy14 cpe:2.3:o:cisco:ios:15.1\(2\)sy14:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy15 cpe:2.3:o:cisco:ios:15.1\(2\)sy15:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy16 cpe:2.3:o:cisco:ios:15.1\(2\)sy16:*:*:*:*:*:*:*
cisco ios 15.2\(1\)e cpe:2.3:o:cisco:ios:15.2\(1\)e:*:*:*:*:*:*:*
cisco ios 15.2\(1\)e1 cpe:2.3:o:cisco:ios:15.2\(1\)e1:*:*:*:*:*:*:*
cisco ios 15.2\(1\)e2 cpe:2.3:o:cisco:ios:15.2\(1\)e2:*:*:*:*:*:*:*
cisco ios 15.2\(1\)e3 cpe:2.3:o:cisco:ios:15.2\(1\)e3:*:*:*:*:*:*:*
cisco ios 15.2\(1\)ey cpe:2.3:o:cisco:ios:15.2\(1\)ey:*:*:*:*:*:*:*

References for CVE-2025-20176

cvelogic Threat Intelligence