CVE-2020-3143 [High] | Path Traversal in Ex60 Firmware

A vulnerability in the video endpoint API (xAPI) of Cisco TelePresence Collaboration Endpoint (CE) Software, Cisco TelePresence Codec (TC) Software, and Cisco RoomOS Software could allow an authenticated, remote attacker to conduct directory traversal attacks on an affected device. The vulnerability is due to insufficient validation of user-supplied input to the xAPI of the affected software. An attacker could exploit this vulnerability by sending a crafted request to the xAPI. A successful exploit could allow the attacker to read and write arbitrary files in the system. To exploit this vulnerability, an attacker would need either an In-Room Control or administrator account.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-18	8.35%	8.45%	+0.10%
2	2026-06-15	1.69%	8.35%	+6.66%
3	2026-05-18	—	1.69%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-18

8.35%

8.45%

+0.10%

2026-06-15

1.69%

8.35%

+6.66%

2026-05-18

—

1.69%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
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]
8.8	3.0	HIGH	`CVSS:3.0/AV:N/AC:L/PR:L/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: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: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.	2.8	5.9	[email protected]
9.0	2.0	HIGH	`AV:N/AC:L/Au:S/C:C/I:C/A:C` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:S) A single authentication is required. Confidentiality impact (C:C) Complete confidentiality impact. Integrity impact (I:C) Complete integrity impact. Availability impact (A:C) Complete availability impact.	8.0	10.0	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

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]

8.8

3.0

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/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: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: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.

2.8

5.9

[email protected]

9.0

2.0

HIGH

AV:N/AC:L/Au:S/C:C/I:C/A:C Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:S): A single authentication is required.
Confidentiality impact (C:C): Complete confidentiality impact.
Integrity impact (I:C): Complete integrity impact.
Availability impact (A:C): Complete availability impact.

8.0

10.0

[email protected]

Affected software / configurations for CVE-2020-3143

Vendor	Product	Version	Raw CPE
cisco	ex60_firmware	—	cpe:2.3:o:cisco:ex60_firmware:-:::::::*
cisco	ex90_firmware	—	cpe:2.3:o:cisco:ex90_firmware:-:::::::*
cisco	sx10_firmware	—	cpe:2.3:o:cisco:sx10_firmware:-:::::::*
cisco	sx20_firmware	—	cpe:2.3:o:cisco:sx20_firmware:-:::::::*
cisco	sx80_firmware	—	cpe:2.3:o:cisco:sx80_firmware:-:::::::*
cisco	telepresence_codec_c40_firmware	—	cpe:2.3:o:cisco:telepresence_codec_c40_firmware:-:::::::*
cisco	telepresence_codec_c60_firmware	—	cpe:2.3:o:cisco:telepresence_codec_c60_firmware:-:::::::*
cisco	telepresence_codec_c90_firmware	—	cpe:2.3:o:cisco:telepresence_codec_c90_firmware:-:::::::*
cisco	telepresence_mx200_firmware	—	cpe:2.3:o:cisco:telepresence_mx200_firmware:-:::::::*
cisco	telepresence_mx300_firmware	—	cpe:2.3:o:cisco:telepresence_mx300_firmware:-:::::::*
cisco	telepresence_mx700_firmware	—	cpe:2.3:o:cisco:telepresence_mx700_firmware:-:::::::*
cisco	telepresence_mx800_firmware	—	cpe:2.3:o:cisco:telepresence_mx800_firmware:-:::::::*
cisco	webex_board_55_firmware	—	cpe:2.3:o:cisco:webex_board_55_firmware:-:::::::*
cisco	webex_board_55s_firmware	—	cpe:2.3:o:cisco:webex_board_55s_firmware:-:::::::*
cisco	webex_board_70_firmware	—	cpe:2.3:o:cisco:webex_board_70_firmware:-:::::::*
cisco	webex_board_70s_firmware	—	cpe:2.3:o:cisco:webex_board_70s_firmware:-:::::::*
cisco	webex_board_85s_firmware	—	cpe:2.3:o:cisco:webex_board_85s_firmware:-:::::::*
cisco	webex_dx70_firmware	—	cpe:2.3:o:cisco:webex_dx70_firmware:-:::::::*
cisco	webex_dx80_firmware	—	cpe:2.3:o:cisco:webex_dx80_firmware:-:::::::*
cisco	webex_room_55_firmware	—	cpe:2.3:o:cisco:webex_room_55_firmware:-:::::::*
cisco	webex_room_70_firmware	—	cpe:2.3:o:cisco:webex_room_70_firmware:-:::::::*

References for CVE-2020-3143

URL	Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-telepresence-path-tr-wdrnYEZZ	Vendor Advisory

URL

CVE-2020-3143 | Cisco TelePresence Collaboration Endpoint, TelePresence Codec, and RoomOS Software Path Traversal Vulnerability

Exploit prediction scoring system (EPSS) score for CVE-2020-3143

Common vulnerability scoring system (CVSS) metrics for CVE-2020-3143

Weakness enumeration for CVE-2020-3143

Affected software / configurations for CVE-2020-3143

References for CVE-2020-3143