CVE-2024-20381 [High] | Security Bypass in Ios Xr

A vulnerability in the JSON-RPC API feature in Cisco Crosswork Network Services Orchestrator (NSO) and ConfD that is used by the web-based management interfaces of Cisco Optical Site Manager and Cisco RV340 Dual WAN Gigabit VPN Routers could allow an authenticated, remote attacker to modify the configuration of an affected application or device.  This vulnerability is due to improper authorization checks on the API. An attacker with privileges sufficient to access the affected application or device could exploit this vulnerability by sending malicious requests to the JSON-RPC API. A successful exploit could allow the attacker to make unauthorized modifications to the configuration of the affected application or device, including creating new user accounts or elevating their own privileges on an affected system.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	1.48%	0.58%	-0.90%
2	2026-05-15	1.86%	1.48%	-0.38%
3	2026-03-28	—	1.86%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

1.48%

0.58%

-0.90%

2026-05-15

1.86%

1.48%

-0.38%

2026-03-28

—

1.86%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.8	3.1	HIGH	`CVSS:3.1/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]
8.8	3.1	HIGH	`CVSS:3.1/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]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.8

3.1

HIGH

CVSS:3.1/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]

8.8

3.1

HIGH

CVSS:3.1/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]

Affected software / configurations for CVE-2024-20381

Vendor	Product	Version	Raw CPE
cisco	ios_xr	6.5.1	cpe:2.3:o:cisco:ios_xr:6.5.1:::::::*
cisco	ios_xr	6.5.2	cpe:2.3:o:cisco:ios_xr:6.5.2:::::::*
cisco	ios_xr	6.5.3	cpe:2.3:o:cisco:ios_xr:6.5.3:::::::*
cisco	ios_xr	6.5.15	cpe:2.3:o:cisco:ios_xr:6.5.15:::::::*
cisco	ios_xr	6.5.25	cpe:2.3:o:cisco:ios_xr:6.5.25:::::::*
cisco	ios_xr	6.5.26	cpe:2.3:o:cisco:ios_xr:6.5.26:::::::*
cisco	ios_xr	6.5.28	cpe:2.3:o:cisco:ios_xr:6.5.28:::::::*
cisco	ios_xr	6.5.29	cpe:2.3:o:cisco:ios_xr:6.5.29:::::::*
cisco	ios_xr	6.5.31	cpe:2.3:o:cisco:ios_xr:6.5.31:::::::*
cisco	ios_xr	6.5.32	cpe:2.3:o:cisco:ios_xr:6.5.32:::::::*
cisco	ios_xr	6.5.33	cpe:2.3:o:cisco:ios_xr:6.5.33:::::::*
cisco	ios_xr	6.5.90	cpe:2.3:o:cisco:ios_xr:6.5.90:::::::*
cisco	ios_xr	6.5.92	cpe:2.3:o:cisco:ios_xr:6.5.92:::::::*
cisco	ios_xr	6.5.93	cpe:2.3:o:cisco:ios_xr:6.5.93:::::::*
cisco	ios_xr	6.6.1	cpe:2.3:o:cisco:ios_xr:6.6.1:::::::*
cisco	ios_xr	6.6.2	cpe:2.3:o:cisco:ios_xr:6.6.2:::::::*
cisco	ios_xr	6.6.3	cpe:2.3:o:cisco:ios_xr:6.6.3:::::::*
cisco	ios_xr	6.6.4	cpe:2.3:o:cisco:ios_xr:6.6.4:::::::*
cisco	ios_xr	6.6.11	cpe:2.3:o:cisco:ios_xr:6.6.11:::::::*
cisco	ios_xr	6.6.12	cpe:2.3:o:cisco:ios_xr:6.6.12:::::::*
cisco	ios_xr	6.6.25	cpe:2.3:o:cisco:ios_xr:6.6.25:::::::*
cisco	ios_xr	6.7.1	cpe:2.3:o:cisco:ios_xr:6.7.1:::::::*
cisco	ios_xr	6.7.2	cpe:2.3:o:cisco:ios_xr:6.7.2:::::::*
cisco	ios_xr	6.7.3	cpe:2.3:o:cisco:ios_xr:6.7.3:::::::*
cisco	ios_xr	6.7.4	cpe:2.3:o:cisco:ios_xr:6.7.4:::::::*
cisco	ios_xr	6.7.35	cpe:2.3:o:cisco:ios_xr:6.7.35:::::::*
cisco	ios_xr	6.8.1	cpe:2.3:o:cisco:ios_xr:6.8.1:::::::*
cisco	ios_xr	6.8.2	cpe:2.3:o:cisco:ios_xr:6.8.2:::::::*
cisco	ios_xr	6.9.1	cpe:2.3:o:cisco:ios_xr:6.9.1:::::::*
cisco	ios_xr	6.9.2	cpe:2.3:o:cisco:ios_xr:6.9.2:::::::*
cisco	ios_xr	7.0.0	cpe:2.3:o:cisco:ios_xr:7.0.0:::::::*
cisco	ios_xr	7.0.1	cpe:2.3:o:cisco:ios_xr:7.0.1:::::::*
cisco	ios_xr	7.0.2	cpe:2.3:o:cisco:ios_xr:7.0.2:::::::*
cisco	ios_xr	7.0.11	cpe:2.3:o:cisco:ios_xr:7.0.11:::::::*
cisco	ios_xr	7.0.12	cpe:2.3:o:cisco:ios_xr:7.0.12:::::::*
cisco	ios_xr	7.0.14	cpe:2.3:o:cisco:ios_xr:7.0.14:::::::*
cisco	ios_xr	7.0.90	cpe:2.3:o:cisco:ios_xr:7.0.90:::::::*
cisco	ios_xr	7.1.1	cpe:2.3:o:cisco:ios_xr:7.1.1:::::::*
cisco	ios_xr	7.1.2	cpe:2.3:o:cisco:ios_xr:7.1.2:::::::*
cisco	ios_xr	7.1.3	cpe:2.3:o:cisco:ios_xr:7.1.3:::::::*
cisco	ios_xr	7.1.15	cpe:2.3:o:cisco:ios_xr:7.1.15:::::::*
cisco	ios_xr	7.1.25	cpe:2.3:o:cisco:ios_xr:7.1.25:::::::*
cisco	ios_xr	7.2.0	cpe:2.3:o:cisco:ios_xr:7.2.0:::::::*
cisco	ios_xr	7.2.1	cpe:2.3:o:cisco:ios_xr:7.2.1:::::::*
cisco	ios_xr	7.2.2	cpe:2.3:o:cisco:ios_xr:7.2.2:::::::*
cisco	ios_xr	7.2.12	cpe:2.3:o:cisco:ios_xr:7.2.12:::::::*
cisco	ios_xr	7.3.1	cpe:2.3:o:cisco:ios_xr:7.3.1:::::::*
cisco	ios_xr	7.3.2	cpe:2.3:o:cisco:ios_xr:7.3.2:::::::*
cisco	ios_xr	7.3.3	cpe:2.3:o:cisco:ios_xr:7.3.3:::::::*
cisco	ios_xr	7.3.4	cpe:2.3:o:cisco:ios_xr:7.3.4:::::::*
cisco	ios_xr	7.3.5	cpe:2.3:o:cisco:ios_xr:7.3.5:::::::*
cisco	ios_xr	7.3.6	cpe:2.3:o:cisco:ios_xr:7.3.6:::::::*
cisco	ios_xr	7.3.15	cpe:2.3:o:cisco:ios_xr:7.3.15:::::::*
cisco	ios_xr	7.3.16	cpe:2.3:o:cisco:ios_xr:7.3.16:::::::*
cisco	ios_xr	7.3.27	cpe:2.3:o:cisco:ios_xr:7.3.27:::::::*
cisco	ios_xr	7.4.1	cpe:2.3:o:cisco:ios_xr:7.4.1:::::::*
cisco	ios_xr	7.4.2	cpe:2.3:o:cisco:ios_xr:7.4.2:::::::*
cisco	ios_xr	7.4.15	cpe:2.3:o:cisco:ios_xr:7.4.15:::::::*
cisco	ios_xr	7.4.16	cpe:2.3:o:cisco:ios_xr:7.4.16:::::::*
cisco	ios_xr	7.5.1	cpe:2.3:o:cisco:ios_xr:7.5.1:::::::*
cisco	ios_xr	7.5.2	cpe:2.3:o:cisco:ios_xr:7.5.2:::::::*
cisco	ios_xr	7.5.3	cpe:2.3:o:cisco:ios_xr:7.5.3:::::::*
cisco	ios_xr	7.5.4	cpe:2.3:o:cisco:ios_xr:7.5.4:::::::*
cisco	ios_xr	7.5.5	cpe:2.3:o:cisco:ios_xr:7.5.5:::::::*
cisco	ios_xr	7.5.12	cpe:2.3:o:cisco:ios_xr:7.5.12:::::::*
cisco	ios_xr	7.5.52	cpe:2.3:o:cisco:ios_xr:7.5.52:::::::*
cisco	ios_xr	7.6.1	cpe:2.3:o:cisco:ios_xr:7.6.1:::::::*
cisco	ios_xr	7.6.2	cpe:2.3:o:cisco:ios_xr:7.6.2:::::::*
cisco	ios_xr	7.6.3	cpe:2.3:o:cisco:ios_xr:7.6.3:::::::*
cisco	ios_xr	7.6.15	cpe:2.3:o:cisco:ios_xr:7.6.15:::::::*
cisco	ios_xr	7.7.1	cpe:2.3:o:cisco:ios_xr:7.7.1:::::::*
cisco	ios_xr	7.7.2	cpe:2.3:o:cisco:ios_xr:7.7.2:::::::*
cisco	ios_xr	7.7.21	cpe:2.3:o:cisco:ios_xr:7.7.21:::::::*
cisco	ios_xr	7.8.1	cpe:2.3:o:cisco:ios_xr:7.8.1:::::::*
cisco	ios_xr	7.8.2	cpe:2.3:o:cisco:ios_xr:7.8.2:::::::*
cisco	ios_xr	7.8.12	cpe:2.3:o:cisco:ios_xr:7.8.12:::::::*
cisco	ios_xr	7.8.22	cpe:2.3:o:cisco:ios_xr:7.8.22:::::::*
cisco	ios_xr	7.9.1	cpe:2.3:o:cisco:ios_xr:7.9.1:::::::*
cisco	ios_xr	7.9.2	cpe:2.3:o:cisco:ios_xr:7.9.2:::::::*
cisco	ios_xr	7.9.21	cpe:2.3:o:cisco:ios_xr:7.9.21:::::::*

References for CVE-2024-20381

URL	Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nso-auth-bypass-QnTEesp	Vendor Advisory

URL

CVE-2024-20381 | Cisco Network Services Orchestrator Configuration Update Authorization Bypass Vulnerability

Exploit prediction scoring system (EPSS) score for CVE-2024-20381

Common vulnerability scoring system (CVSS) metrics for CVE-2024-20381

Weakness enumeration for CVE-2024-20381

Affected software / configurations for CVE-2024-20381

References for CVE-2024-20381