// For flags

CVE-2021-1244

Cisco IOS XR Software for Cisco 8000 Series Routers and Network Convergence System 540 Series Routers Image Verification Vulnerabilities

Severity Score

6.7
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

Multiple vulnerabilities in Cisco Network Convergence System (NCS) 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for the Cisco 8000 Series Routers could allow an authenticated, local attacker to execute unsigned code during the boot process on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Múltiples vulnerabilidades en los Enrutadores Cisco Network Convergence System (NCS) 540 Series, solo cuando ejecutan imágenes de Software de NCS540L de Cisco IOS XR, y el Software Cisco IOS XR para los Enrutadores Cisco 8000 Series, podrían permitir a un atacante autenticado local ejecutar código sin firmar durante el proceso de arranque en un dispositivo afectado. Para mayor información sobre estas vulnerabilidades, consulte la sección Detalles de este aviso

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2020-11-13 CVE Reserved
  • 2021-02-04 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-11-08 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-347: Improper Verification of Cryptographic Signature
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
< 7.0.12
Search vendor "Cisco" for product "Ios Xr" and version " < 7.0.12"
-
Affected
in Cisco
Search vendor "Cisco"
8201
Search vendor "Cisco" for product "8201"
--
Safe
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
< 7.0.12
Search vendor "Cisco" for product "Ios Xr" and version " < 7.0.12"
-
Affected
in Cisco
Search vendor "Cisco"
8202
Search vendor "Cisco" for product "8202"
--
Safe
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
< 7.0.12
Search vendor "Cisco" for product "Ios Xr" and version " < 7.0.12"
-
Affected
in Cisco
Search vendor "Cisco"
8808
Search vendor "Cisco" for product "8808"
--
Safe
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
< 7.0.12
Search vendor "Cisco" for product "Ios Xr" and version " < 7.0.12"
-
Affected
in Cisco
Search vendor "Cisco"
8812
Search vendor "Cisco" for product "8812"
--
Safe
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
< 7.0.12
Search vendor "Cisco" for product "Ios Xr" and version " < 7.0.12"
-
Affected
in Cisco
Search vendor "Cisco"
8818
Search vendor "Cisco" for product "8818"
--
Safe
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
>= 7.1.0 < 7.2.1
Search vendor "Cisco" for product "Ios Xr" and version " >= 7.1.0 < 7.2.1"
-
Affected
in Cisco
Search vendor "Cisco"
8201
Search vendor "Cisco" for product "8201"
--
Safe
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
>= 7.1.0 < 7.2.1
Search vendor "Cisco" for product "Ios Xr" and version " >= 7.1.0 < 7.2.1"
-
Affected
in Cisco
Search vendor "Cisco"
8202
Search vendor "Cisco" for product "8202"
--
Safe
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
>= 7.1.0 < 7.2.1
Search vendor "Cisco" for product "Ios Xr" and version " >= 7.1.0 < 7.2.1"
-
Affected
in Cisco
Search vendor "Cisco"
8808
Search vendor "Cisco" for product "8808"
--
Safe
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
>= 7.1.0 < 7.2.1
Search vendor "Cisco" for product "Ios Xr" and version " >= 7.1.0 < 7.2.1"
-
Affected
in Cisco
Search vendor "Cisco"
8812
Search vendor "Cisco" for product "8812"
--
Safe
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
>= 7.1.0 < 7.2.1
Search vendor "Cisco" for product "Ios Xr" and version " >= 7.1.0 < 7.2.1"
-
Affected
in Cisco
Search vendor "Cisco"
8818
Search vendor "Cisco" for product "8818"
--
Safe
Cisco
Search vendor "Cisco"
Ios Xr
Search vendor "Cisco" for product "Ios Xr"
< 7.2.1
Search vendor "Cisco" for product "Ios Xr" and version " < 7.2.1"
-
Affected
in Cisco
Search vendor "Cisco"
Ncs 540
Search vendor "Cisco" for product "Ncs 540"
--
Safe