CVE-2020-12140: contiki-ng Classic Buffer Overflow
Modified
Published 07-12-2021Last modified 04-08-2024
Vulnerability summary
CVE-2020-12140 is a high (CVSS 8.8) Classic Buffer Overflow vulnerability in contiki-ng. EPSS estimates a 0.95% chance of exploitation in the next 30 days, higher than 60.8% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
0.95%
0%100%
Low · +0.03 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded
Timeline
- 07-12-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A buffer overflow in os/net/mac/ble/ble-l2cap.c in the BLE stack in Contiki-NG 4.4 and earlier allows an attacker to execute arbitrary code via malicious L2CAP frames.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 8.3Preferred score · NVD (NIST)
AV:A/AC:L/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
0.95%
Chance of exploitation in the next 30 days
Percentile
61%
Versus all other CVEs
30-day change
Increase +0.03 pp
From 0.92% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Contiki-ng1 product
- contiki-ng≤ 4.4
1 vendor · 1 product