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CVE-2020-16163

28
FAUCET Score

CVE-2020-16163 affects RIPE NCC RPKI Validator 3.x before version 3.1-2020.07.06.14.28, where it fails to validate TLS HTTPS endpoints during RRDP fetches. This critical vulnerability (CVSS 9.1) allows remote attackers to bypass access restrictions and potentially cause denial of service to co-dependent routing systems. While third parties assert this behavior is intentionally permitted by RFC 8182, the lack of validation presents a significant risk. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0, <= 3.1-2020.07.06.14.28CPE matchmatch criteria
cpe:2.3:a:ripe:rpki_validator_3:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.27%
Probability of exploitation in next 30 days
EPSS Percentile
66.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0127 is in the 53rd percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / RIPE-NCC/rpki-validator-3/issues/159
Third Party Advisory