October 22, 2026

CVE Watchtower

← Back to CVE List

CVE-2026-16656NVD

Vulnerability Summary

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to gain root privileges due to improper authentication.
Severity Level
CRITICAL(9.8)
Published Date
Aug 19, 2026
Last Modified
Aug 20, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.42%Probability
Root Weakness (CWE)
CWE-287: Improper Authentication ↗
When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct.
CVSS v3.1 Base Metrics — Score 9.8 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Ibm Vios >= 4.1.0 and < 4.1.0.50
  • Ibm Vios >= 4.1.1.0 and < 4.1.1.30
  • Ibm Vios >= 4.1.2.0 and < 4.1.2.20
  • Ibm Aix >= 7.2.5 and <= 7.2.5.212
  • Ibm Aix >= 7.3.2 and <= 7.3.2.5
  • Ibm Aix >= 7.3.3 and <= 7.3.3.2
  • Ibm Aix >= 7.3.4 and <= 7.3.4.1
Patched Versions
  • Ibm Vios 4.1.0.50
  • Ibm Vios 4.1.1.30
  • Ibm Vios 4.1.2.20
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References