Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2020-19860

23
FAUCET Score

CVE-2020-19860 describes a heap out-of-bounds read vulnerability in ldns version 1.7.1, specifically within the ldns_rr_new_frm_str_internal function when verifying zone files. This flaw allows an unauthenticated attacker to leak heap information by crafting a malicious zone file. Rated with a CVSS score of 6.5 (Medium), the vulnerability has low attack complexity but high confidentiality impact, though it requires user interaction. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.7.1CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:ldns:1.7.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.31%
Probability of exploitation in next 30 days
EPSS Percentile
67.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0131 is in the 80th percentile among its peer group of 26,236 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ldns

Vendor Advisories (1)

redhatCVE-2020-19860Moderate

ldns: heap overread vulnerability via zone file

Jan 21, 2022

References

github.com / NLnetLabs/ldns/commit/15d96206996bea969fbc918eb0a4a346f514b9f3
PatchThird Party Advisory
github.com / NLnetLabs/ldns/issues/50
ExploitIssue TrackingThird Party Advisory