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NVD / CVE Program· CNA adobe

CVE-2018-4871: An Out-of-bounds Read issue was discovered in Adobe Flash Player before 28.0.0.137.

HighCVSS 7.5 · v3.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 32/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 5.5% (FIRST EPSS); higher than 92.9% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: flash-plugin (Red Hat:rhel_extras:6) 0:28.0.0.137-1.el6_9.

Low priority for now. Upgrade to flash-plugin (Red Hat:rhel_extras:6) 0:28.0.0.137-1.el6_9 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An Out-of-bounds Read issue was discovered in Adobe Flash Player before 28.0.0.137. This vulnerability occurs because of computation that reads data that is past the end of the target buffer. The use of an invalid (out-of-range) pointer offset during access of internal data structure fields causes the vulnerability. A successful attack can lead to sensitive data exposure.

Published
Jan 9, 2018
Updated
Jun 16, 2026
EPSS
5.5% · 92th percentile

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 5.5%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
adobeflash player
redhatenterprise linux desktop
redhatenterprise linux server
redhatenterprise linux workstation
applemacos
googlechrome os
linuxlinux kernel
microsoftwindows
microsoftwindows 10
microsoftwindows 8.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (adobe). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a Adobe Flash Player before 28.0.0.137

    • Adobe Flash Player before 28.0.0.137affected
Affected versions · NVD (4)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • adobe flash playerup to 28.0.0.126 inclusive
  • redhat enterprise linux desktop6.0
  • redhat enterprise linux server6.0
  • redhat enterprise linux workstation6.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Red Hat:rhel_extras:6flash-pluginbefore 0:28.0.0.137-1.el6_90:28.0.0.137-1.el6_9

Same product

adobe: all records

Other highest-scoring records for the same primary product.

  • CVE-2015-5119Use-after-free vulnerability in the ByteArray class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through…KEV
    99Now
  • CVE-2015-3113Heap-based buffer overflow in Adobe Flash Player before 13.0.0.296 and 14.x through 18.x before 18.0.0.194 on Windows and OS X and before…KEV
    99Now
  • CVE-2014-0497Integer underflow in Adobe Flash Player before 11.7.700.261 and 11.8.x through 12.0.x before 12.0.0.44 on Windows and Mac OS X, and before…KEV
    99Now

Published before and after this one in the same product

  • ← EarlierCVE-2017-3114Dec 9, 2017 · An issue was discovered in Adobe Flash Player 27.0.0.183 and earlier versions.
    41Plan
  • ← EarlierCVE-2017-11305Dec 13, 2017 · A regression affecting Adobe Flash Player version 27.0.0.187 (and earlier versions) causes the unintended reset of the global settings…
    27Monitor
  • Later →CVE-2018-4877Feb 6, 2018 · A use-after-free vulnerability was discovered in Adobe Flash Player before 28.0.0.161.
    42Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
red hat:flash-plugin0:28.0.0.137-1.el6_9 · Red Hat:rhel_extras:6Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records