PatchSiren

PatchSiren cyber security CVE debrief

CVE-2021-27101 Accellion CVE debrief

CVE-2021-27101 is an Accellion FTA SQL injection vulnerability that CISA listed in its Known Exploited Vulnerabilities catalog. The KEV entry marks it as known to be used in ransomware campaigns, which makes it a high-priority remediation item for any organization still running Accellion FTA. CISA’s KEV guidance calls for applying updates per vendor instructions.

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

Security and IT teams responsible for Accellion FTA, vulnerability management, incident response, and any environment exposed to external file-transfer services. Organizations with third-party dependencies on Accellion FTA should also verify remediation status and exposure.

Technical summary

The supplied official records identify CVE-2021-27101 as an SQL injection issue in Accellion FTA. CISA added the CVE to the Known Exploited Vulnerabilities catalog on 2021-11-03 and marked known ransomware campaign use as present. The KEV entry’s required action is to apply updates per vendor instructions. No further technical specifics were included in the supplied corpus.

Defensive priority

Critical. CISA has designated this as a known exploited vulnerability with ransomware campaign association, and the KEV due date was 2021-11-17.

Recommended defensive actions

  • Verify whether any Accellion FTA instances are present in the environment, including legacy or externally managed deployments.
  • Apply vendor-recommended updates or mitigations immediately, following the CISA KEV required action guidance.
  • If exposure existed after public disclosure, review logs, access paths, and downstream data handling for signs of misuse.
  • Prioritize remediation before or ahead of the KEV due date when using historical timelines for risk management.
  • Track any third-party services or partners that may still rely on Accellion FTA and confirm their remediation status.

Evidence notes

CISA’s Known Exploited Vulnerabilities JSON entry for CVE-2021-27101 lists vendorProject Accellion, product FTA, vulnerabilityName "Accellion FTA SQL Injection Vulnerability," dateAdded 2021-11-03, dueDate 2021-11-17, knownRansomwareCampaignUse "Known," and requiredAction "Apply updates per vendor instructions." The source corpus also provides official CVE and NVD record links for the identifier.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-27101 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-27101

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

  • CVE-2021-27101 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-27101

    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.