CVE-2020-10883Known exploitationPublic exploit

Privilege escalation via improper filesystem permissions

Published Mar 25, 2020 · Updated Aug 4, 2024

Incorrect filesystem permissions in TP-Link Archer A7 firmware 190726 allow local users with low-privileged code execution to escalate privileges. The firmware filesystem assigns insufficient permissions to critical resources, but the affected paths and exact write operation are undisclosed. Exploitation requires existing low-privileged code execution on the router and grants control beyond that account's assigned permissions.

CVSS severity5.3
Medium
EPSS probability5.96%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect filesystem permissions in TP-Link Archer A7 firmware 190726 allow local users with low-privileged code execution to escalate privileges. The firmware filesystem assigns insufficient permissions to critical resources, but the affected paths and exact write operation are undisclosed. Exploitation requires existing low-privileged code execution on the router and grants control beyond that account's assigned permissions.

The record

CVE
CVE-2020-10883
Published
Mar 25, 2020
Updated
Aug 4, 2024
Vendor
TP-Link
Product
Archer A7
Classifications
CWE-732, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Firmware Ver: 190726

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

TP-Link · Archer A7version=Firmware Ver: 190726

Published CVSS scores

5.3Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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