CVE-2020-14937· NVD / CVE Program· CNA mitre

Memory access out of buffer boundaries issues was discovered in Contiki-NG 4.4 through 4.5, in the SNMP BER encoder/decoder.

Memory access out of buffer boundaries issues was discovered in Contiki-NG 4.4 through 4.5, in the SNMP BER encoder/decoder. The length of provided input/output buffers is insufficiently verified during the encoding and decoding of data. This may lead to out-of-bounds buffer read or write access in BER decoding and encoding functions.

CriticalCVSS 9.1 · v3.1—No exploit No fix recorded

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Published: Aug 18, 2020
Updated: Jun 16, 2026
EPSS: 1.5% · 73th percentile
CWE: CWE-125

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Action score

Monitor

Low priority for now.

CVSS: 36 / 40 · 9.1 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.5%

Affected systems

Vendor	Product	CPE
contiki-ng	contiki-ng	cpe:2.3:o:contiki-ng:contiki-ng

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

contiki-ng contiki-ng4.4 and later · up to 4.5 inclusive

Same product

contiki-ng: all records

Other highest-scoring records for the same primary product.

CVE-2020-24336An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5.
57Plan
CVE-2018-19417An issue was discovered in the MQTT server in Contiki-NG before 4.2.
42Plan
CVE-2018-1000804contiki-ng version 4 contains a Buffer Overflow vulnerability in AQL (Antelope Query Language) database engine that can result in Attacker c
41Plan
CVE-2022-35927Unverified DIO prefix info lengths in RPL-Classic in Contiki-NG
40Plan
CVE-2020-14935Buffer overflows were discovered in Contiki-NG 4.4 through 4.5, in the SNMP bulk get request response encoding function.
40Plan
CVE-2019-8359An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0.
40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).