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TI-2020-10247 Aliases CVE-2020-12886GHSA-8v45-9mw2-ffmm

A buffer over-read was discovered in the CoAP library in Arm Mbed OS 5.15.3.

Priority MEDIUM 42CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A buffer over-read was discovered in the CoAP library in Arm Mbed OS 5.15.3. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse() parses the CoAP packet header starting from the message token. The length of the token in the received message is provided in the first byte parsed by the sn_coap_parser_options_parse() function. The length encoded in the message is not validated against the actual input buffer length before accessing the token. As a result, memory access outside of the intended boundary of the buffer may occur.

Why it matters now

EPSS 0.01352 71st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:arm:mbed_os:5.15.3:*:*:*:*:*:*:*5.15.3VulnerableArm
  • cpe:2.3:o:arm:mbed_os:5.15.3:*:*:*:*:*:*:* Versions 5.15.3 Vulnerable ·Arm

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-12886
  2. 2026-10-03 Alias added: GHSA-8v45-9mw2-ffmm

References

Advisory 2

  • TI-2024-32659 An issue was discovered in MBed OS 6.16.0. CVSS 3.1CRITICAL 9.8
  • TI-2020-10244 Buffer over-reads were discovered in the CoAP library in Arm Mbed OS 5.15.3. CVSS 3.1CRITICAL 9.1
  • TI-2020-10245 A buffer over-read was discovered in the CoAP library in Arm Mbed OS 5.15.3. CVSS 3.1CRITICAL 9.1
  • TI-2020-10246 An infinite loop was discovered in the CoAP library in Arm Mbed OS 5.15.3. CVSS 3.1HIGH 7.5
  • TI-2024-15175 Buffer Overflow vulnerability in ARM mbed-os v.6.17.0 allows a remote attacker to execute… CVSS 3.1HIGH 7.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences