CVE-2024-20354 [Medium] | Denial of Service in Wireless Lan Controller S…

A vulnerability in the handling of encrypted wireless frames of Cisco Aironet Access Point (AP) Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on the affected device. This vulnerability is due to incomplete cleanup of resources when dropping certain malformed frames. An attacker could exploit this vulnerability by connecting as a wireless client to an affected AP and sending specific malformed frames over the wireless connection. A successful exploit could allow the attacker to cause degradation of service to other clients, which could potentially lead to a complete DoS condition.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-12-28	0.05%	0.04%	-0.01%
2	2025-12-27	0.04%	0.05%	+0.01%
3	2025-12-25	—	0.04%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-12-28

0.05%

0.04%

-0.01%

2025-12-27

0.04%

0.05%

+0.01%

2025-12-25

—

0.04%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
4.7	3.1	MEDIUM	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L` 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:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	2.8	1.4	[email protected]
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

4.7

3.1

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L 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:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

2.8

1.4

[email protected]

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-2024-20354

Vendor	Product	Version	Raw CPE
cisco	wireless_lan_controller_software	>= 8.5.171.0, < 8.6.0.0	cpe:2.3:a:cisco:wireless_lan_controller_software::::::::
cisco	wireless_lan_controller_software	>= 8.10.130.0, < 8.10.190.81	cpe:2.3:a:cisco:wireless_lan_controller_software::::::::
cisco	ios_xe	>= 16.12.4a, < 17.1.0	cpe:2.3:o:cisco:ios_xe::::::::
cisco	ios_xe	>= 17.3.0, < 17.3.9	cpe:2.3:o:cisco:ios_xe::::::::
cisco	ios_xe	>= 17.4.0, < 17.6.7	cpe:2.3:o:cisco:ios_xe::::::::
cisco	ios_xe	>= 17.7.0, < 17.9.5	cpe:2.3:o:cisco:ios_xe::::::::
cisco	ios_xe	>= 17.10.0, < 17.12.2	cpe:2.3:o:cisco:ios_xe::::::::

References for CVE-2024-20354

URL	Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-airo-ap-dos-PPPtcVW	Vendor Advisory

URL

CVE-2024-20354

Exploit prediction scoring system (EPSS) score for CVE-2024-20354

Common vulnerability scoring system (CVSS) metrics for CVE-2024-20354

Weakness enumeration for CVE-2024-20354

Affected software / configurations for CVE-2024-20354

References for CVE-2024-20354