CVE-2023-37791: D-Link DIR-619L v2.04(TW) was discovered to contain a stack overflow via the curTime parameter at /goform/form

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CRITICAL 9.8REMOTEMITIGATE

CVE-2023-37791 is a critical-severity flaw (CVSS 9.8) affecting dir-619l firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

D-Link DIR-619L v2.04(TW) was discovered to contain a stack overflow via the curTime parameter at /goform/formLogin.

Why this priority

Critical severity
EPSS top 4%: very likely to be exploited
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	12.7% (top 4%)
CISA exploited list	No
Weakness	CWE-787
Published	2023-07-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dlink

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-07-17 19:15 UTCPublished CVE record published
2026-06-17 06:08 UTCUpdated Record last modified

dlink dir-619l firmware MITIGATE

Affected: 2.04

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.04

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · borgmatic · FIXED · 2.2.0-1.fc46 · FEDORA-2026-041229e71b · source

sudo dnf upgrade --advisory=FEDORA-2026-041229e71b

Fedora ELN · pie · FIXED · 1.5.4-1.eln159 · FEDORA-2026-a2c0261d3a · source

sudo dnf upgrade --advisory=FEDORA-2026-a2c0261d3a

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/naihsin/IoT/tree/main/D-Link/DIR-619L/overflow
Write-up: www.dlink.com/en/security-bulletin/

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-37791?

dir-619l firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-37791 being exploited?

CVE-2023-37791 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-37791 affect?

CVE-2023-37791 affects dir-619l firmware. Severity is critical (CVSS 9.8). D-Link DIR-619L v2.04(TW) was discovered to contain a stack overflow via the curTime parameter at /goform/formLogin.

How urgent is CVE-2023-37791?

Priority 71/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2026-2056 MEDIUM 5.3 MITIGATE MITIGATE A security vulnerability has been detected in D-Link DIR-605L and DIR-619L 2.06B01/2.13B01
CVE-2026-2055 MEDIUM 5.3 MITIGATE MITIGATE A weakness has been identified in D-Link DIR-605L and DIR-619L 2.06B01/2.13B01
CVE-2026-2054 MEDIUM 5.3 MITIGATE MITIGATE A security flaw has been discovered in D-Link DIR-605L and DIR-619L 2.06B01/2.13B01
CVE-2025-8978 MEDIUM 6.6 MITIGATE A vulnerability was determined in D-Link DIR-619L 6.02CN02
CVE-2025-6617 HIGH 8.8 MITIGATE A vulnerability was found in D-Link DIR-619L 2.06B01 and classified as critical

References

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