Background exploitation KEV catalog Ransomware No authentication
CVE-2021-21975

VMware Server Side Request Forgery in vRealize Operations Manager API

Server Side Request Forgery in vRealize Operations Manager API (CVE-2021-21975) prior to 8.4 may allow a malicious actor with network access to the vRealize Operations Manager API can perform a Server Side Request Forgery attack to steal…

CheckOps priority index
9.3/10 Patch within 24 h
Severity9.8
Probability7.8
Exploitation5/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 78.0% higher than 99.6% of CVEs
CVSS 3.1 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:
Exploited for 1,750 days 18 Jan 2022
CISA due date 01 Feb 2022 for US federal agencies

Exploitation probability EPSS · FIRST

05010026 Sep05 Oct15 Oct24 Oct02 Nov
EPSS probability (%)Percentile among all CVEs

Exploitation signals 5 / 5

  • KEV catalog (CISA)18 Jan 2022
  • Exploited in EUVD (ENISA)18 Jan 2022
  • Used by ransomwareyes
  • EPSS above 10 %78.0%
  • No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply updates per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

Server Side Request Forgery in vRealize Operations Manager API (CVE-2021-21975) prior to 8.4 may allow a malicious actor with network access to the vRealize Operations Manager API can perform a Server Side Request Forgery attack to steal administrative credentials.

Affected products

VMware vRealize OperationsvRealize Operations Manager API
Affected versions
  • VMware vRealize Operations prior to 8.4
Weaknesses (CWE)

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

  1. Published

  2. Exploitation reported (ENISA)

  3. Added to the KEV catalog

  4. CISA remediation due date

  5. EPSS peak: 78.3%

References

Other exploited vulnerabilities from the same vendor

  • CVE-2025-22226VMware ESXi, Workstation, and Fusion Information Disclosure Vulnerability
    4.1 · Background exploitation
  • CVE-2025-22225VMware ESXi Arbitrary Write Vulnerability
    5.1 · Background exploitation
  • CVE-2025-22224VMware ESXi and Workstation TOCTOU Race Condition Vulnerability
    5.0 · Background exploitation
  • CVE-2024-38813VMware vCenter Server Privilege Escalation Vulnerability
    5.3 · Background exploitation
  • CVE-2024-38812VMware vCenter Server Heap-Based Buffer Overflow Vulnerability
    8.0 · Background exploitation
  • CVE-2024-37085VMware ESXi Authentication Bypass Vulnerability
    5.9 · Background exploitation

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Sources: CISA KEV · ENISA EUVD · FIRST EPSS · OSV. Public data aggregated by CheckOps, updated automatically. Source texts remain the property of their authors. All exploited vulnerabilities