CVE-2022-4499Network attack vector

Credential disclosure via httpd strcmp timing

Published Jan 11, 2023 · Updated Nov 4, 2025

Timing side channel in TP-Link Archer C5 V2_160221_US and TL-WR710N V1-151022 allows remote attackers to recover HTTP credentials. The httpd credential check uses strcmp, whose response time varies with matching username and password bytes, exposing a deterministic byte-by-byte oracle. Network access to HTTP Basic Authentication is sufficient; the disclosed consequence is recovery of the router username and password.

CVSS severity7.5
High
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Timing side channel in TP-Link Archer C5 V2_160221_US and TL-WR710N V1-151022 allows remote attackers to recover HTTP credentials. The httpd credential check uses strcmp, whose response time varies with matching username and password bytes, exposing a deterministic byte-by-byte oracle. Network access to HTTP Basic Authentication is sufficient; the disclosed consequence is recovery of the router username and password.

The record

CVE
CVE-2022-4499
Published
Jan 11, 2023
Updated
Nov 4, 2025
Vendor
TP-Link
Product
Archer C5
Classifications
CWE-203, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record 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=V2_160221_US

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TP-Link · Archer C5version=V2_160221_US
TP-Link · TL-WR710Nversion=V1-151022

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-203Observable Discrepancy
T1110Brute Force

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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