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Exploited vulnerability · CISA KEV

Is CVE-2021-1497 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Cisco HyperFlex HX · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2021-1497, Cisco HyperFlex HX Installer Virtual Machine Command Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 181 days after it was published. It affects Cisco HyperFlex HX. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Nov 2021
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due17 Nov 2021BOD 22-01 deadline

What it is

Cisco HyperFlex HX Installer Virtual Machine contains an insufficient input validation vulnerability which could allow an attacker to execute commands on an affected device as the root user.

VendorCisco (103 exploited CVEs in KEV)
ProductHyperFlex HX
VulnerabilityCisco HyperFlex HX Installer Virtual Machine Command Injection Vulnerability
WeaknessCWE-78
Published6 May 2021
Added to KEV3 Nov 2021
Reported by (CNA)cisco

What to do

  1. Check whether you run it. Look for HyperFlex HX in your asset inventory, including appliances and cloud images. Stack check lists every exploited Cisco CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 6 May 2021.
  4. Get told next time. Email alerts when CISA adds a CVE for Cisco.

Other exploited CVEs in HyperFlex HX

References

Questions

Is CVE-2021-1497 being exploited?

Yes. CISA added CVE-2021-1497 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2021-1497 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2021-1497?

Apply updates per vendor instructions. Check Cisco's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected HyperFlex HX and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2021 · Cisco scorecard · act-now radar.

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