PatchSiren

PatchSiren cyber security CVE debrief

CVE-2021-27102 Accellion CVE debrief

CVE-2021-27102 is an OS command injection vulnerability affecting Accellion FTA. CISA included it in the Known Exploited Vulnerabilities catalog on 2021-11-03 and marked it as having known ransomware campaign use, which makes this a high-priority issue for any organization still relying on the product.

Vendor
Accellion
Product
FTA
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Organizations that operate Accellion FTA, along with security and IT teams responsible for patching, monitoring, and retiring file transfer systems, should treat this as urgent.

Technical summary

The CVE is described as an OS command injection issue in Accellion FTA. The supplied authoritative sources identify it as a known exploited vulnerability and note known ransomware campaign use. The documented defensive action is to apply updates per vendor instructions.

Defensive priority

Urgent. CISA lists this CVE in KEV, with a remediation due date of 2021-11-17, and the entry notes known ransomware campaign use.

Recommended defensive actions

  • Apply updates per vendor instructions.
  • Prioritize identification of any Accellion FTA instances in your environment.
  • Review exposure and monitoring for systems using Accellion FTA.
  • Use the CISA KEV due date as the remediation target and escalate if patching is not immediately possible.

Evidence notes

All statements are based on the supplied CISA KEV source item and the linked official records. The source metadata names the vulnerability as 'Accellion FTA OS Command Injection Vulnerability,' lists 'knownRansomwareCampaignUse' as 'Known,' and records 'requiredAction' as 'Apply updates per vendor instructions.' CVE and source published/modified dates supplied for this record are 2021-11-03.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-27102 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-27102

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2021-27102 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-27102

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.