CVE-2021-22894KEV · OVERDUECWE-94

Ivanti Pulse Connect Secure Collaboration Suite Buffer Overflow Vulnerability

High · published May 27, 2021

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.8. It is confirmed in active exploitation. It sits in the 98.7th percentile for exploit probability.

1635
days past CISA
deadline
CVSS v3.1
8.8
EPSS
41%
Percentile
98.7
In the wild
Confirmed
What it is

🚨 A sneaky buffer overflow in Pulse Connect Secure means a remote attacker might cozy up and execute code as the root user! 🔥 Think of it like a crowded meeting room where someone sneaks in a fake agenda, and suddenly everyone is following their orders instead of the real plan. That's how this exploit allows unauthorized commands to hijack the system! An attacker could gain root access, leading to all sorts of chaos — they could steal sensitive data, alter configurations, or even lock you out entirely. It's a digital heist waiting to happen, and the damage could be absolutely devastating!

Put simply

Think of it like a crowded meeting room where someone sneaks in a fake agenda, and suddenly everyone is following their orders instead of the real plan. That's how this exploit allows unauthorized commands to hijack the system! This vulnerability allows an authenticated remote attacker to overflow a buffer by sending malicious data, enabling them to execute arbitrary code at the highest level of privilege.

What to do

An attacker could gain root access, leading to all sorts of chaos — they could steal sensitive data, alter configurations, or even lock you out entirely. It's a digital heist waiting to happen, and the damage could be absolutely devastating! Update Pulse Connect Secure to version 9.1R11.4 or later immediately. Review your access controls and ensure only trusted users have authenticated access. Regularly audit your configurations to ensure nothing fishy is lurking! You've got this! Follow the steps, patch up, and keep your systems safe and sound. 🛡️

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.41284 · 98.7th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2021-05-27T11:15Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 27 MAY 11:15Z
    A buffer overflow vulnerability exists in Pulse Connect Secure before 9.1R11.4 allows a remote authenticated attacker to execute arbitrary code as the root…
    cvelistv5