CVE-2025-0282: Ivanti Connect Secure, Policy Secure, and ZTA Gateways Stack-Based Buffer Overflow Vulnerability

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

• Yes, if you run Ivanti Connect Secure, Policy Secure, and ZTA Gateways. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-01-08, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-01-15; treat that as the outer limit, not the target. CISA also lists it as known to be used in ransomware campaigns.
• EPSS 100.0%, percentile 100.0: FIRST’s model estimates a 100.0% chance of exploitation activity in the next 30 days, higher than 100.0% of all scored CVEs (very high). EPSS is a probability, not a verdict.
• Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
• Editorial verdict: Check exposure. Ivanti Connect Secure Zero-Day RCE (CVE-2025-0282) — A real zero-day used for espionage and patched in January 2025; if you ran Connect Secure below 22.7R2.5 last winter, a clean patch level today does not prove you were never backdoored.

What it is

A stack-based buffer overflow in Ivanti Connect Secure before version 22.7R2.5, Ivanti Policy Secure before version 22.7R1.2, and Ivanti Neurons for ZTA gateways before version 22.7R2.3 allows a remote unauthenticated attacker to achieve remote code execution.

CISA’s summary

Ivanti Connect Secure, Policy Secure, and ZTA Gateways contain a stack-based buffer overflow which can lead to unauthenticated remote code execution.

Weakness type: CWE-121.

Product: Ivanti Connect Secure, Policy Secure, and ZTA Gateways · Assigned by: ivanti · Published: 2025-01-08

Affected and fixed versions

Severity scores

• Attack vector: network (remotely reachable)
• Attack complexity: high (needs special conditions)
• Privileges required: none (no login)
• User interaction: none
• Scope: changed (can affect other components)

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

• CISA KEV: added 2025-01-08; federal due date 2025-01-15. Known ransomware use: Known.
• CISA required action: Apply mitigations as set forth in the CISA instructions linked below to include conducting hunt activities, taking remediation actions if applicable, and applying updates prior to returning a device to service.
• CISA SSVC assessment: exploitation active, automatable no, technical impact total.
• FIRST EPSS (model of 2026-10-21): 99.98% probability of exploitation activity in the next 30 days; percentile 100.0.

Timeline

• 2025-01-08 — Added to CISA’s Known Exploited Vulnerabilities catalog
• 2025-01-08 — CVE record published by ivanti
• 2025-01-08 — erroneo.us brief: Ivanti Connect Secure Zero-Day RCE (CVE-2025-0282)
• 2025-01-15 — CISA remediation deadline for US federal agencies
• 2026-10-01 — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vendor and project advisories, patches

1. Listed in CISA KEV notes (forums.ivanti.com) forums.ivanti.com

Vulnerability records

1. CVE.org record CVE-2025-0282 cve.org
2. NVD entry CVE-2025-0282 nvd.nist.gov

Government

1. CISA Known Exploited Vulnerabilities catalog entry cisa.gov
2. Listed in CISA KEV notes (cisa.gov) cisa.gov

Other references from the CVE record and advisory

1. labs.watchtowr.com labs.watchtowr.com
2. cisa.gov cisa.gov
3. github.com github.com
4. cisa.gov cisa.gov
5. cloud.google.com cloud.google.com

All exploited Ivanti vulnerabilities · Today’s Security Digest