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CVE-2025-6703

19
FAUCET Score

CVE-2025-6703 describes an improper input validation vulnerability in Mozilla neqo, affecting versions 0.4.24 through 0.13.2. This medium-severity flaw (CVSS 6.5) can lead to an unexploitable crash, requiring user interaction over a network to trigger. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.4.24, <= 0.13.2CPE matchmatch criteria
cpe:2.3:a:mozilla:neqo:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 4.0

2.3LOW

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/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:A/V:X/RE:L/U:Clear

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

Exploit Intelligence

EPSS Score
0.21%
Probability of exploitation in next 30 days
EPSS Percentile
11.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0021 is in the 12th percentile among its peer group of 26,221 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

Vendor Patches (11)

github_advisoryvendor investigatingvia nvd_reference
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: firefox
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: gjs
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: thunderbird
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: firefox
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: thunderbird
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: firefox
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: gjs
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: polkit
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: thunderbird

Vendor Advisories (1)

redhatCVE-2025-6703Low

neqo-transport: neqo-transport panic

Jun 26, 2025

References

github.com / mozilla/neqo/security/advisories/GHSA-jfv6-x22w-grhf
Vendor Advisory