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01 Record

CVE-2021-1379

Cisco IP Phones Cisco Discovery Protocol and Link Layer Discovery Protocol Remote Code Execution and Denial of Service Vulnerabilities

MediumPUBLISHEDCNA: cisco
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/RL:X/RC:X/E:X
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02 Description

Cisco IP Phones Cisco Discovery Protocol and Link Layer Discovery Protocol Remote Code Execution and Denial of Service Vulnerabilities

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.32% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 25.7% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-11-18 15:42Z1 YR AGO
Last updated
2024-11-18 16:23Z1 YR AGO
Reserved
2020-11-13
Assigning CNA
cisco
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/RL:X/RC:X/E:X
Weaknesses
  • CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
Data version
5.1
Document digest
150712d418dbad824a6733ed8dd4b210477bb0e4bd012dba501e98398a845212

05 Affected products

VendorProductVersionsPlatforms
CiscoCisco IP Phones with Multiplatform Firmware11.1.2, 11.2.1, 11.2.3, 11.2.2, 11.2.3 MSR1-1, 11.1.2 MSR1-1, 11.1.1, 11.1.2 MSR3-1, 11.0.0, 11.1.1 MSR1-1, 11.0.1, 11.1.1 MSR2-1, 11.2.4, 11.0.1 MSR1-1, 11.0.2, 11.3.1, 11.3.1 MSR1-3, 11.3.2, 11.3.1 MSR2-6, 11.3.1 MSR3-3—
CiscoCisco Session Initiation Protocol (SIP) Software9.0(3), 9.0(2)SR2, 9.0(2)SR1, 9.2(1), 9.4(2)SR1, 9.4(2), 9.4(2)SR2, 9.4(2)SR3, 9.3(1)SR2, 9.3(1)SR3, 9.3(1)SR1, 9.1(1)SR1, 9.3(1)SR4, 9.2(3), 9.2(1)SR2, 9.3(1), 9.4(2)SR4, 12.1(1)SR1, 11.5(1), 10.3(2), 10.2(2), 10.3(1), 10.3(1)SR4, 11.0(1), 10.4(1)SR2 3rd Party, 11.7(1), 12.1(1), 11.0(0.7) MPP, 9.3(4) 3rd Party, 12.5(1)SR2, 10.2(1)SR1, 9.3(4)SR3 3rd Party, 10.2(1), 12.5(1), 10.3(1)SR2, 11-0-1MSR1-1, 10.4(1) 3rd Party, 12.5(1)SR1, 11.5(1)SR1, 10.1(1)SR2, 12.0(1)SR2, 12.6(1), 10.3(1.11) 3rd Party, 12.0(1), 12.0(1)SR1, 9.3(3), 12.5(1)SR3, 10.3(1)SR4b, 9.3(4)SR1 3rd Party, 10.3(1)SR5, 10.1(1.9), 10.3(1.9) 3rd Party, 9.3(4)SR2 3rd Party, 10.3(1)SR1, 10.3(1)SR3, 10.1(1)SR1, 12.0(1)SR3, 12.6(1)SR1, 12.7(1), 10.3(1)SR6, 12.8(1), 12.7(1)SR1, 11.0(2)SR1, 11.0(4), 11.0(2), 11.0(4)SR3, 11.0(5), 11.0(3)SR2, 11.0(3)SR4, 11.0(3)SR3, 11.0(2)SR2, 11.0(4)SR1, 11.0(5)SR3, 11.0(3), 11.0(5)SR2, 11.0(3)SR6, 11.0(5)SR1, 11.0(4)SR2, 11.0(3)SR1, 11.0(3)SR5—
CiscoCisco Small Business IP Phones7.4.8, 7.4.3, 7.5.5a, 7.3.7, 7.5.2, 7.5.1, 7.4.6, 7.5.7, 7.4.4, 7.6.2SR3, 7.6.2, 7.5.6, 7.5.6c, 7.6.0, 7.4.7, 7.6.2SR6, 7.5.2b, 7.5.5, 7.5.6a, 7.6.2SR2, 7.5.3, 7.5.2a, 7.5.6(XU), 7.5.7s, 7.6.2SR4, 7.6.2SR1, 7.4.9, 7.5.5b, 7.6.2SR5, 7.5.4, 7.6.1, 7.6.2SR7—

06 References