Is CVE-2021-26955 in the CISA KEV catalog?

No. CVE-2021-26955 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-26955?

CVE-2021-26955 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-26955?

CVE-2021-26955 has an EPSS score of 1.73% (75th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26955?

Upgrade rust-xcb on debian 12 to 1.1.1-1 or later.

CVE & CISA-KEV Catalog

CVE-2021-26955

CRITICALEPSS 75th pctl

9.8

CVSS v3

NVD

Description

An issue was discovered in the xcb crate through 2021-02-04 for Rust. It has a soundness violation because xcb::xproto::GetAtomNameReply::name() calls std::str::from_utf8_unchecked() on unvalidated bytes from an X server.

CWE-252

How to fix

Remediation Available

rust-xcbDebian

Fixed in:1.1.1-1CVE-2021-26955

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.73%probability of exploitation in 30 days

75thpercentile

Elevated risk: more likely to be exploited than 75% of all known CVEs.

References

Exploit1

rustsec.org

Embed a live status badge for CVE-2021-26955

Markdown

[![CVE-2021-26955](https://tridentstack.com/cve/badge/CVE-2021-26955.svg)](https://tridentstack.com/cve/CVE-2021-26955)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-26955"><img src="https://tridentstack.com/cve/badge/CVE-2021-26955.svg" alt="CVE-2021-26955"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.