CVE-2021-35942

9.1 CRITICAL 3% exploit odds No fix listed Memory safety Library

What it is

The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash or read arbitrary memory in parse_param (in posix/wordexp.c) when called with an untrusted, crafted pattern, potentially resulting in a denial of service or disclosure of information. This occurs because atoi was used but strtoul should have been used to ensure correct calculations.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, service disruption.
Exploit odds: 2.8% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2021-06-29 00:00 UTC ReservedThe CVE id was reserved by its CNA
2021-07-22 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-14 12:17 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 2.8% in the next 30 days (EPSS).
Severity: 9.1 CRITICAL (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2021-07-22 18:15 UTC
Last modified: 2026-10-14 12:17 UTC
Exploit probability: 2.8% · EPSS, next 30 days
Weakness: CWE-190 · Integer overflow
Record status: Modified

Affected

Gnu Glibc < 2.31
Netapp Active Iq Unified Manager
Netapp e-series Santricity Os Controller ≤ 11.70.1
Netapp Hci Management Node
Netapp Ontap Select Deploy Administration Utility
Netapp Solidfire
Debian Linux 10.0

Attack profile CVSS 3.1 · 9.1

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: High

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-35942.md and follow it. Check whether this project is affected by CVE-2021-35942. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record