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Not in CISA KEV
HIGH severity

CVE-2021-25904 — av-data

HIGH

CVE-2021-25904 is a high-severity (CVSS 7.5) NULL Pointer Dereference vulnerability in av-data. 1 public exploit reference exists, so weaponization risk is real. A fix is available for av-data — see the affected versions and patch details below.

Null pointer deference in av-data

Also known asRUSTSEC-2021-0007
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs70th percentile — riskier than 70% of all scored CVEsHighest risk
0.00%0.61%1.22%1.83%0.4%1.3%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2021-25904 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🦀av-data

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

An issue was discovered in the av-data crate before 0.3.0 for Rust. A raw pointer is dereferenced, leading to a read of an arbitrary memory address, sometimes causing a segfault.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🦀crates.ioav-dataall versions0.3.0cargo update -p av-data --precise 0.3.0

Affected Products

1 product · 1 configurations
Application
av-dataav-data_project
< 0.3.0
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

An issue was discovered in the av-data crate before 0.3.0 for Rust. A ra…

rustsec.orgNVDFeb 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for av-data, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update av-data to 0.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-25904 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

An issue was discovered in the av-data crate before 0.3.0 for Rust. A raw pointer is dereferenced, leading to a read of an arbitrary memory address, sometimes causing a segfault.
O3 Security · Impact-Aware SCA

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CVE-2021-25904: av-data — Fixed in 0.3.0