CVE-2025-20202 [High] | Denial of Service in Ios Xe

A vulnerability in Cisco IOS XE Wireless Controller Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of access point (AP) Cisco Discovery Protocol (CDP) neighbor reports when they are processed by the wireless controller. An attacker could exploit this vulnerability by sending a crafted CDP packet to an AP. A successful exploit could allow the attacker to cause an unexpected reload of the wireless controller that is managing the AP, resulting in a DoS condition that affects the wireless network.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-03	0.01%	0.09%	+0.08%
2	2025-05-08	—	0.01%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-03

0.01%

0.09%

+0.08%

2025-05-08

—

0.01%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.4	3.1	HIGH	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H` Click to expand Attack vector (AV:A) Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet. 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:N) No account or special rights needed—anonymous or random user is enough. 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.	2.8	4.0	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.4

3.1

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H Click to expand

Attack vector (AV:A): Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
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:N): No account or special rights needed—anonymous or random user is enough.
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.

2.8

4.0

[email protected]

Affected software / configurations for CVE-2025-20202

Vendor	Product	Version	Raw CPE
cisco	ios_xe	16.10.1	cpe:2.3:o:cisco:ios_xe:16.10.1:::::::*
cisco	ios_xe	16.10.1a	cpe:2.3:o:cisco:ios_xe:16.10.1a:::::::*
cisco	ios_xe	16.10.1b	cpe:2.3:o:cisco:ios_xe:16.10.1b:::::::*
cisco	ios_xe	16.10.1c	cpe:2.3:o:cisco:ios_xe:16.10.1c:::::::*
cisco	ios_xe	16.10.1d	cpe:2.3:o:cisco:ios_xe:16.10.1d:::::::*
cisco	ios_xe	16.10.1e	cpe:2.3:o:cisco:ios_xe:16.10.1e:::::::*
cisco	ios_xe	16.10.1f	cpe:2.3:o:cisco:ios_xe:16.10.1f:::::::*
cisco	ios_xe	16.10.1g	cpe:2.3:o:cisco:ios_xe:16.10.1g:::::::*
cisco	ios_xe	16.10.1s	cpe:2.3:o:cisco:ios_xe:16.10.1s:::::::*
cisco	ios_xe	16.10.2	cpe:2.3:o:cisco:ios_xe:16.10.2:::::::*
cisco	ios_xe	16.10.3	cpe:2.3:o:cisco:ios_xe:16.10.3:::::::*
cisco	ios_xe	16.11.1	cpe:2.3:o:cisco:ios_xe:16.11.1:::::::*
cisco	ios_xe	16.11.1a	cpe:2.3:o:cisco:ios_xe:16.11.1a:::::::*
cisco	ios_xe	16.11.1b	cpe:2.3:o:cisco:ios_xe:16.11.1b:::::::*
cisco	ios_xe	16.11.1s	cpe:2.3:o:cisco:ios_xe:16.11.1s:::::::*
cisco	ios_xe	16.11.2	cpe:2.3:o:cisco:ios_xe:16.11.2:::::::*
cisco	ios_xe	16.12.1	cpe:2.3:o:cisco:ios_xe:16.12.1:::::::*
cisco	ios_xe	16.12.1a	cpe:2.3:o:cisco:ios_xe:16.12.1a:::::::*
cisco	ios_xe	16.12.1c	cpe:2.3:o:cisco:ios_xe:16.12.1c:::::::*
cisco	ios_xe	16.12.1s	cpe:2.3:o:cisco:ios_xe:16.12.1s:::::::*
cisco	ios_xe	16.12.1t	cpe:2.3:o:cisco:ios_xe:16.12.1t:::::::*
cisco	ios_xe	16.12.1w	cpe:2.3:o:cisco:ios_xe:16.12.1w:::::::*
cisco	ios_xe	16.12.1x	cpe:2.3:o:cisco:ios_xe:16.12.1x:::::::*
cisco	ios_xe	16.12.1y	cpe:2.3:o:cisco:ios_xe:16.12.1y:::::::*
cisco	ios_xe	16.12.1z1	cpe:2.3:o:cisco:ios_xe:16.12.1z1:::::::*
cisco	ios_xe	16.12.1z2	cpe:2.3:o:cisco:ios_xe:16.12.1z2:::::::*
cisco	ios_xe	16.12.2	cpe:2.3:o:cisco:ios_xe:16.12.2:::::::*
cisco	ios_xe	16.12.2a	cpe:2.3:o:cisco:ios_xe:16.12.2a:::::::*
cisco	ios_xe	16.12.2s	cpe:2.3:o:cisco:ios_xe:16.12.2s:::::::*
cisco	ios_xe	16.12.3	cpe:2.3:o:cisco:ios_xe:16.12.3:::::::*
cisco	ios_xe	16.12.3a	cpe:2.3:o:cisco:ios_xe:16.12.3a:::::::*
cisco	ios_xe	16.12.3s	cpe:2.3:o:cisco:ios_xe:16.12.3s:::::::*
cisco	ios_xe	16.12.4	cpe:2.3:o:cisco:ios_xe:16.12.4:::::::*
cisco	ios_xe	16.12.4a	cpe:2.3:o:cisco:ios_xe:16.12.4a:::::::*
cisco	ios_xe	16.12.5	cpe:2.3:o:cisco:ios_xe:16.12.5:::::::*
cisco	ios_xe	16.12.5a	cpe:2.3:o:cisco:ios_xe:16.12.5a:::::::*
cisco	ios_xe	16.12.5b	cpe:2.3:o:cisco:ios_xe:16.12.5b:::::::*
cisco	ios_xe	16.12.6	cpe:2.3:o:cisco:ios_xe:16.12.6:::::::*
cisco	ios_xe	16.12.6a	cpe:2.3:o:cisco:ios_xe:16.12.6a:::::::*
cisco	ios_xe	16.12.7	cpe:2.3:o:cisco:ios_xe:16.12.7:::::::*
cisco	ios_xe	16.12.8	cpe:2.3:o:cisco:ios_xe:16.12.8:::::::*
cisco	ios_xe	16.12.9	cpe:2.3:o:cisco:ios_xe:16.12.9:::::::*
cisco	ios_xe	16.12.10	cpe:2.3:o:cisco:ios_xe:16.12.10:::::::*
cisco	ios_xe	16.12.10a	cpe:2.3:o:cisco:ios_xe:16.12.10a:::::::*
cisco	ios_xe	16.12.11	cpe:2.3:o:cisco:ios_xe:16.12.11:::::::*
cisco	ios_xe	16.12.12	cpe:2.3:o:cisco:ios_xe:16.12.12:::::::*
cisco	ios_xe	17.1.1	cpe:2.3:o:cisco:ios_xe:17.1.1:::::::*
cisco	ios_xe	17.1.1a	cpe:2.3:o:cisco:ios_xe:17.1.1a:::::::*
cisco	ios_xe	17.1.1s	cpe:2.3:o:cisco:ios_xe:17.1.1s:::::::*
cisco	ios_xe	17.1.1t	cpe:2.3:o:cisco:ios_xe:17.1.1t:::::::*
cisco	ios_xe	17.1.3	cpe:2.3:o:cisco:ios_xe:17.1.3:::::::*
cisco	ios_xe	17.2.1	cpe:2.3:o:cisco:ios_xe:17.2.1:::::::*
cisco	ios_xe	17.2.1a	cpe:2.3:o:cisco:ios_xe:17.2.1a:::::::*
cisco	ios_xe	17.2.1r	cpe:2.3:o:cisco:ios_xe:17.2.1r:::::::*
cisco	ios_xe	17.2.1v	cpe:2.3:o:cisco:ios_xe:17.2.1v:::::::*
cisco	ios_xe	17.2.2	cpe:2.3:o:cisco:ios_xe:17.2.2:::::::*
cisco	ios_xe	17.2.3	cpe:2.3:o:cisco:ios_xe:17.2.3:::::::*
cisco	ios_xe	17.3.1	cpe:2.3:o:cisco:ios_xe:17.3.1:::::::*
cisco	ios_xe	17.3.1a	cpe:2.3:o:cisco:ios_xe:17.3.1a:::::::*
cisco	ios_xe	17.3.1w	cpe:2.3:o:cisco:ios_xe:17.3.1w:::::::*
cisco	ios_xe	17.3.1x	cpe:2.3:o:cisco:ios_xe:17.3.1x:::::::*
cisco	ios_xe	17.3.1z	cpe:2.3:o:cisco:ios_xe:17.3.1z:::::::*
cisco	ios_xe	17.3.2	cpe:2.3:o:cisco:ios_xe:17.3.2:::::::*
cisco	ios_xe	17.3.2a	cpe:2.3:o:cisco:ios_xe:17.3.2a:::::::*
cisco	ios_xe	17.3.3	cpe:2.3:o:cisco:ios_xe:17.3.3:::::::*
cisco	ios_xe	17.3.4	cpe:2.3:o:cisco:ios_xe:17.3.4:::::::*
cisco	ios_xe	17.3.4a	cpe:2.3:o:cisco:ios_xe:17.3.4a:::::::*
cisco	ios_xe	17.3.4b	cpe:2.3:o:cisco:ios_xe:17.3.4b:::::::*
cisco	ios_xe	17.3.4c	cpe:2.3:o:cisco:ios_xe:17.3.4c:::::::*
cisco	ios_xe	17.3.5	cpe:2.3:o:cisco:ios_xe:17.3.5:::::::*
cisco	ios_xe	17.3.5a	cpe:2.3:o:cisco:ios_xe:17.3.5a:::::::*
cisco	ios_xe	17.3.5b	cpe:2.3:o:cisco:ios_xe:17.3.5b:::::::*
cisco	ios_xe	17.3.6	cpe:2.3:o:cisco:ios_xe:17.3.6:::::::*
cisco	ios_xe	17.3.7	cpe:2.3:o:cisco:ios_xe:17.3.7:::::::*
cisco	ios_xe	17.3.8	cpe:2.3:o:cisco:ios_xe:17.3.8:::::::*
cisco	ios_xe	17.3.8a	cpe:2.3:o:cisco:ios_xe:17.3.8a:::::::*
cisco	ios_xe	17.4.1	cpe:2.3:o:cisco:ios_xe:17.4.1:::::::*
cisco	ios_xe	17.4.1a	cpe:2.3:o:cisco:ios_xe:17.4.1a:::::::*
cisco	ios_xe	17.4.1b	cpe:2.3:o:cisco:ios_xe:17.4.1b:::::::*
cisco	ios_xe	17.4.2	cpe:2.3:o:cisco:ios_xe:17.4.2:::::::*

References for CVE-2025-20202

URL	Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-cdp-dos-fpeks9K	Vendor Advisory

URL

CVE-2025-20202

Exploit prediction scoring system (EPSS) score for CVE-2025-20202

Common vulnerability scoring system (CVSS) metrics for CVE-2025-20202

Weakness enumeration for CVE-2025-20202

Affected software / configurations for CVE-2025-20202

References for CVE-2025-20202