CVE-2021-3999
⚠️ highSummary
A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.
CVSS Score
7.8
High
EPSS Score
1.0
Exploit Probability
Published Date
2022-08-24
First Seen: 2026-01-05
📊 Relative Risk Intelligence
This CVE is Moderate Risk - more severe than 69.6% of all 328,009 vulnerabilities in our database.
#99,625
Above average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Dec 2, 2025
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
SSVC data provided by
CISA
Last Modified
2025-12-02
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE IDs (Weakness Types)