CVE Intelligence
High Denial of service exploit reference

CVE-2020-8285 — curl 7.21.0 to and including 7.73.0 is vulnerable to uncontrolled recursion due to a stack...

curl 7.21.0 to and including 7.73.0 is vulnerable to uncontrolled recursion due to a stack overflow issue in FTP wildcard match parsing.

Published Dec 14, 2020 · Updated Oct 14, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: hackerone

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 9.8% (30-day exploitation probability)+14
  • Technical severity (high)+6
  • CISA SSVC: exploitation "poc"+5
  • Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
9.77%
ahead of 95% of scored CVEs · Oct 14, 2026
Affects
Apple
Mac Os X and 21 more
CVSS base
7.5
High · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
Proof of concept
none · proof-of-concept · active
Automatable
Yes
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Apple Mac Os X, Apple Macos, Debian Debian Linux…).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. Apply the fixed version or the patch documented under Remediation.
  4. EPSS ahead of 95% of scored CVEs: prioritize it in the patch queue.
  5. Search available logs for exploit probes matching the vulnerability class (denial of service), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Apple Mac Os X version 10.14.6-security_update_2019-001version 10.15.7version 10.14.6-security_update_2021-001version 10.14.6-security_update_2020-007version 10.14.6-security_update_2020-006version 10.14.6-security_update_2020-005version 10.14.6-security_update_2020-004version 10.14.6-security_update_2020-003
and 9 more version 10.14.6-security_update_2020-002version 10.14.6-security_update_2020-001version 10.14.6-security_update_2019-002version 10.14.6≥ 10.15 and < 10.15.7< 10.14.6version 10.15.7-security_update_2020-001version 10.15.7-security_update_2021-001version 10.15.7-supplemental_update
Vulnerable NIST National Vulnerability Database
Apple Macos ≥ 11.0 and < 11.3 Vulnerable NIST National Vulnerability Database
Debian Debian Linux version 10.0version 9.0 Vulnerable NIST National Vulnerability Database
Fedoraproject Fedora version 33version 32 Vulnerable NIST National Vulnerability Database
Fujitsu M10-1 Firmware < xcp3110< xcp2410 Vulnerable NIST National Vulnerability Database
Fujitsu M10-4 Firmware < xcp3110< xcp2410 Vulnerable NIST National Vulnerability Database
Fujitsu M10-4s Firmware < xcp2410< xcp3110 Vulnerable NIST National Vulnerability Database
Fujitsu M12-1 Firmware < xcp3110< xcp2410 Vulnerable NIST National Vulnerability Database
Fujitsu M12-2 Firmware < xcp2410< xcp3110 Vulnerable NIST National Vulnerability Database
Fujitsu M12-2s Firmware < xcp2410< xcp3110 Vulnerable NIST National Vulnerability Database
Haxx Libcurl ≥ 7.21.0 and < 7.74.0 Vulnerable NIST National Vulnerability Database
Netapp Clustered Data Ontap versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Hci Bootstrap Os versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Hci Management Node versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Hci Storage Node Firmware versions not specified by the source Vulnerable NIST National Vulnerability Database
Netapp Solidfire versions not specified by the source Vulnerable NIST National Vulnerability Database
Oracle Communications Billing And Revenue Management version 12.0.0.3.0 Vulnerable NIST National Vulnerability Database
Oracle Communications Cloud Native Core Policy version 1.14.0 Vulnerable NIST National Vulnerability Database
Oracle Essbase version 21.2 Vulnerable NIST National Vulnerability Database
Oracle Peoplesoft Enterprise Peopletools version 8.58 Vulnerable NIST National Vulnerability Database
Siemens Sinec Infrastructure Network Services < 1.0.1.1 Vulnerable NIST National Vulnerability Database
Splunk Universal Forwarder version 9.1.0≥ 9.0.0 and < 9.0.6≥ 8.2.0 and < 8.2.12 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
7.5 CVSS 3.1 High 3.9 3.6 nvd@nist.gov via NIST National Vulnerability Database
7.5 CVSS 3.1 High 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database
7.5 CVSS 3.1 High — — GitHub, Inc. via GitHub Security Advisories
7.5 CVSS 3.1 High — — CISA-ADP via CVE Program (cve.org) e CISA ADP
5.0 CVSS 2.0 Medium 10.0 2.9 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-674 · Uncontrolled Recursion

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 9.77%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Track CPU/memory spikes and availability drops correlated with request patterns.
web/proxy/WAF logsnetwork IDS/IPSresource metrics

Timeline

What happened to this CVE, newest first.

  • 2026
  • SSVC assessment updated
    Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 14, 2026
  • Fix documented
    Oct 14, 2026 · NIST National Vulnerability Database
  • Affected products added · haxx/libcurl, debian/debian linux, fedoraproject/fedora, netapp/clustered data ontap, netapp/hci management node, netapp
    Oct 14, 2026 · NIST National Vulnerability Database
  • CVSS changed · 7.5
    Oct 14, 2026 · NIST National Vulnerability Database
  • Source status changed · → Modified
    Oct 14, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 14, 2026 · Alertas do Telegram
  • 2020
  • CVE published
    Dec 14, 2020 · hackerone

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 14, 2026 – Oct 14, 2026
  • 1× Official description updated · Oct 14, 2026 – Oct 14, 2026

References

31 on the record

Elsewhere on this site

Apple
every CVE for this vendor
Denial of service
same class
CWE-674
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-86950 Apple Multiple Products Out-of-Bounds Write Vulnerability KEV 17d
  • CVE-2026-65400 Apple macOS Improper Authentication Vulnerability KEV Aug 6, 2026
  • CVE-2026-12996 A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote... Jul 30, 2026
  • CVE-2026-60152 Improper Authorization in Oracle Peoplesoft Enterprise Peopletools Jul 21, 2026
  • CVE-2026-47048 Open Redirect in Oracle Peoplesoft Enterprise Peopletools Jul 21, 2026
  • CVE-2026-47049 Improper Access Control in Oracle Peoplesoft Enterprise Peopletools Jul 21, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2020-8285 is "curl 7.21.0 to and including 7.73.0 is vulnerable to uncontrolled recursion due to a stack...", rated High. It affects Mac Os X (Apple); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.5 describes technical severity. EPSS 9.77% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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