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CVE-2020-27891

19
FAUCET Score

CVE-2020-27891 describes a denial-of-service vulnerability in the Zigbee protocol implementation on Texas Instruments CC2538 devices running Z-Stack 3.0.1. Improper processing of a ZCL Read Reporting Configuration Response message can lead to a crash in the zclHandleExternal() function. This vulnerability has a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely without authentication, resulting in a complete loss of availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.1CPE matchmatch criteria
cpe:2.3:a:ti:z-stack:3.0.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.46%
Probability of exploitation in next 30 days
EPSS Percentile
70.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0146 is in the 52nd percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / zigbeeprotocol/Z-Fuzzer/tree/master/vulnerabilities
Third Party Advisory
ti.com / tool/Z-STACK
ProductVendor Advisory