Red Hat Security Advisory: ACS 4.4 enhancement and security update
Affects Red Hat ACS 4.4Source GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 21:52 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.8% chance of exploitation in 30 days – higher than 58% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 2 Dec 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
AI-suggested
Apply the Red Hat ACS 4.4.7 update which includes the security fix for CVE-2024-21538. No additional mitigation steps are indicated by the vendor.
Description
Red Hat released an update for ACS 4.4.7 addressing a Regular Expression Denial of Service (ReDoS) vulnerability identified as CVE-2024-21538 in the cross-spawn component. The vulnerability could allow an attacker to cause a denial of service by exploiting inefficient regular expression processing. The severity is rated as low by the vendor.