CVE-2024-20429 [Medium] | Input Validation Bypass in Asyncos

A vulnerability in the web-based management interface of Cisco AsyncOS for Secure Email Gateway could allow an authenticated, remote attacker to execute arbitrary system commands on an affected device. This vulnerability is due to insufficient input validation in certain portions of the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with root privileges. To successfully exploit this vulnerability, an attacker would need at least valid Operator credentials.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-08-25	0.05%	0.09%	+0.04%
2	2025-08-08	0.10%	0.05%	-0.06%
3	2025-03-30	—	0.10%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-08-25

0.05%

0.09%

+0.04%

2025-08-08

0.10%

0.05%

-0.06%

2025-03-30

—

0.10%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.5	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N` 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:H) They need powerful rights—admin, root, or similar—before this pays off. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	1.2	5.2	[email protected]
7.2	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/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:H) They need powerful rights—admin, root, or similar—before this pays off. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.2	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.5

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N 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:H): They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

1.2

5.2

[email protected]

7.2

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/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:H): They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.2

5.9

[email protected]

Affected software / configurations for CVE-2024-20429

Vendor	Product	Version	Raw CPE
cisco	asyncos	11.0.3-238	cpe:2.3:o:cisco:asyncos:11.0.3-238:::::::*
cisco	asyncos	11.1.0-069	cpe:2.3:o:cisco:asyncos:11.1.0-069:::::::*
cisco	asyncos	11.1.0-128	cpe:2.3:o:cisco:asyncos:11.1.0-128:::::::*
cisco	asyncos	11.1.0-131	cpe:2.3:o:cisco:asyncos:11.1.0-131:::::::*
cisco	asyncos	12.0.0-419	cpe:2.3:o:cisco:asyncos:12.0.0-419:::::::*
cisco	asyncos	12.1.0-071	cpe:2.3:o:cisco:asyncos:12.1.0-071:::::::*
cisco	asyncos	12.1.0-087	cpe:2.3:o:cisco:asyncos:12.1.0-087:::::::*
cisco	asyncos	12.1.0-089	cpe:2.3:o:cisco:asyncos:12.1.0-089:::::::*
cisco	asyncos	12.5.0-066	cpe:2.3:o:cisco:asyncos:12.5.0-066:::::::*
cisco	asyncos	12.5.3-041	cpe:2.3:o:cisco:asyncos:12.5.3-041:::::::*
cisco	asyncos	12.5.4-041	cpe:2.3:o:cisco:asyncos:12.5.4-041:::::::*
cisco	asyncos	13.0.0-392	cpe:2.3:o:cisco:asyncos:13.0.0-392:::::::*
cisco	asyncos	13.0.5-007	cpe:2.3:o:cisco:asyncos:13.0.5-007:::::::*
cisco	asyncos	13.5.1-277	cpe:2.3:o:cisco:asyncos:13.5.1-277:::::::*
cisco	asyncos	13.5.4-038	cpe:2.3:o:cisco:asyncos:13.5.4-038:::::::*
cisco	asyncos	14.0.0-698	cpe:2.3:o:cisco:asyncos:14.0.0-698:::::::*
cisco	asyncos	14.2.0-620	cpe:2.3:o:cisco:asyncos:14.2.0-620:::::::*
cisco	asyncos	14.2.1-020	cpe:2.3:o:cisco:asyncos:14.2.1-020:::::::*

References for CVE-2024-20429

URL	Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-priv-esc-ssti-xNO2EOGZ	Vendor Advisory

URL

CVE-2024-20429

Exploit prediction scoring system (EPSS) score for CVE-2024-20429

Common vulnerability scoring system (CVSS) metrics for CVE-2024-20429

Weakness enumeration for CVE-2024-20429

Affected software / configurations for CVE-2024-20429

References for CVE-2024-20429