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CVE-2025-13470

24
FAUCET Score

CVE-2025-13470 is a critical vulnerability in RNP version 0.18.0 where a refactoring regression causes the symmetric session key for Public-Key Encrypted Session Key (PKESK) packets to be uninitialized, resulting in an all-zero key. This allows for trivial decryption of any data encrypted using public-key encryption in this specific RNP version, fully compromising confidentiality. The vulnerability carries a CVSS score of 7.5 (High), indicating a network-exploitable flaw with low attack complexity and high impact on confidentiality, with no impact on integrity or availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
RiboseRNP
0.18.0CNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 4.0

7.7HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:H/U:Red

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 5th percentile among its peer group of 51,506 CVEs.

Social Chatter

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

Vendor Advisories (1)

redhatCVE-2025-13470Important

RNP: RNP: Confidentiality compromise due to uninitialized symmetric session key in Public-Key Encrypted Session Key (PKESK) packets

Nov 21, 2025

References

access.redhat.com / security/cve/cve-2025-13402
aur.archlinux.org / packages/rnp
bugzilla.redhat.com / show_bug.cgi
github.com / rnpgp/rnp/commit/7bd9a8dc356aae756b40755be76d36205b6b161a
github.com / rnpgp/rnp/releases/tag/v0.18.1
launchpad.net / ubuntu/+source/rnp
open.ribose.com / advisories/ra-2025-11-20
packages.gentoo.org / packages/dev-util/librnp