What is the CVSS score of CVE-2025-60550?

CVE-2025-60550 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.4%.

How to fix or mitigate CVE-2025-60550?

Within 24 hours, identify all D-Link DIR-600L Ax devices running firmware 1.16WWb01 in your environment and restrict access to the web management interface to trusted internal networks only; if remote management is enabled, disable it immediately. Within 7 days, apply interim mitigations such as network segmentation to isolate these routers from untrusted networks and monitor for unusual traffic targeting the formEasySetTimezone handler. Within 30 days, evaluate replacement of affected routers with supported models or apply any vendor-supplied firmware updates when they become available; if no update is released, consider retiring the devices. Since no patch is available, implement compensating controls as described.

D-Link DIR-600L CVE-2025-60550

HIGH

Stack-based Buffer Overflow (CWE-121)

2025-10-24 cve@mitre.org

Buffer Overflow D-Link Stack Overflow Dir 600L Firmware

7.5

CVSS 3.1 · Vendor: mitre

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Reach router HTTP admin interface
Exploit

Send oversized curTime to formEasySetTimezone
Execution

Overflow stack buffer (CWE-121)
Impact

Crash or hang device (DoS)

Vulnerability Assessment

Weakness	CWE CWE-121 ASVS 5.0 V15 - Secure Coding and Architecture Stack buffer bounds checking MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Exploitation requires network reachability to the DIR-600L web management interface and the ability to invoke the formEasySetTimezone function with an attacker-controlled, oversized curTime parameter; the overflow is triggered by the length/content of that parameter. Limiting factors: the HTTP admin interface is typically exposed only on the LAN unless remote management is explicitly enabled, which constrains internet-wide exploitation; the supplied vector indicates PR:N (no authentication) but the sources do not independently confirm whether this handler is pre- or post-authentication, so the authentication requirement is not confirmed from available data. Affected firmware is specifically DIR-600L 1.16WWb01 (FW116WWb01).
Impact	The input CVSS base score is 7.5 driven entirely by the availability metric (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) - confidentiality and integrity impact are rated None, so the official scoring treats this as a remote denial-of-service (device crash) rather than a code-execution flaw. Real-world urgency signals are modest and internally consistent: EPSS is low at 0.37% (31st percentile), the CVE is NOT on the CISA KEV list, and there is no confirmed active exploitation. The vuln.today 'this_week' decision label suggests moderate, not emergency, prioritization. A tension worth flagging: CWE-121 (stack-based buffer overflow) in a router web handler commonly carries code-execution potential, yet the official vector scores only A:H - the available sources do not confirm whether memory corruption here is controllable enough for RCE, so the true integrity/confidentiality impact is unverified and may be understated. Net: this is a genuine but not top-tier priority - a low-EPSS, non-KEV availability flaw in a specific consumer router, warranting scheduled remediation rather than emergency response, with the caveat that the stack-overflow class leaves RCE as an unconfirmed possibility.
Exploit ScenarioDerived	An attacker able to reach the DIR-600L HTTP management interface sends a request to the formEasySetTimezone handler with an oversized curTime parameter, overflowing a stack buffer (CWE-121) and crashing the device or corrupting memory. Given AV:N/AC:L/PR:N in the supplied vector, this requires only low-complexity network access with no stated authentication or user interaction. A public PoC reference exists on GitHub but is not verified as working exploit code; the scored impact is availability loss (device reboot/hang).

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 28, 2026

A stack-based buffer overflow in the D-Link DIR-600L Ax router firmware 1.16WWb01 (FW116WWb01) lets remote attackers crash the device by sending an oversized curTime parameter to the formEasySetTimezone handler on the web management interface. The official CVSS 3.1 score of 7.5 is driven entirely by availability impact (C:N/I:N/A:H), so the scoring treats this as a remote denial-of-service against the router rather than a confirmed code-execution path; confidentiality and integrity impacts are rated None. No exploitation has been confirmed in the field (not in CISA KEV), EPSS is low at 0.37% (31st percentile), and a public write-up with proof-of-concept detail exists on GitHub but is not verified as working exploit code; the priority label is this_week. The CVSS vector indicates PR:N, but the sources do not confirm whether the affected handler is reachable pre- or post-authentication.

RemediationAI

No vendor-released patch or fixed firmware version is identified in the available data for CVE-2025-60550, so the primary action is to check D-Link's support site and the vendor advisory channels for a DIR-600L Ax firmware update that addresses the formEasySetTimezone overflow and, if one is published, flash it and re-verify the version string. Where no update is available, reduce exposure of the vulnerable handler: ensure remote/WAN management is disabled so the administration interface is reachable only from the LAN, and block inbound access to the router's web UI ports at the perimeter firewall - this removes the internet-facing path but does nothing against an attacker already on the local network or against a malicious client behind the router. Segment or isolate the device on its own VLAN, restrict which hosts can reach its management IP, and replace the unit if it is out of vendor support, since consumer routers past end-of-life generally receive no firmware fixes. Monitor for unexpected reboots or management-interface unavailability as an indicator that the overflow has been triggered, and consult the public write-up at https://github.com/luckysmallbird/DLINK-DIR600LAx-Vulnerability/blob/main/04-buffer%20overflow-formEasySetTimezone.md and https://vuldb.com/vuln/329808 for the exact request shape when validating mitigations.

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Technical ContextAI · show details

The flaw is classified as CWE-121, stack-based buffer overflow, in the formEasySetTimezone function of the DIR-600L Ax firmware's embedded web management application. The function processes the curTime HTTP parameter and copies it into a fixed-size stack buffer without adequate length validation; an attacker-supplied value longer than the buffer overwrites adjacent stack memory, which per the assessed impact results in a crash or reboot loop of the device (availability only). The affected device is a small-consumer/SOHO router whose administration interface normally listens on the LAN side, so the attack surface is the local network unless remote management has been explicitly enabled; the trigger is invoked by sending a crafted request to the timezone configuration endpoint. The root cause class is the classic unvalidated POST/GET parameter copy found in embedded CGI handlers, and the exact CPE identifies the single affected firmware build as cpe:2.3:o:dlink:dir-600l_firmware:1.16wwb01. The sources do not describe the detailed memory layout or any exploitation primitives beyond the overflow itself.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (mitre) PRIMARY 7.5 HIGH

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

vuln.today AI 7.5 HIGH

Network-facing web parameter with low-complexity trigger and no confirmed authentication (PR:N); confirmed impact is device crash (A:H), while code execution (C/I) is plausible but unverified in the sources.

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

4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (mitre).

CVSS VectorVendor: mitre

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionCVE.org

D-Link DIR600L Ax FW116WWb01 was discovered to contain a buffer overflow via the curTime parameter in the function formEasySetTimezone.

Executive ViewAI

Why It Matters

CVE-2025-60550 is a high-severity stack-based buffer overflow in D-Link DIR-600L Ax router firmware (1.16WWb01) that can be triggered by a remote, unauthenticated attacker to crash the device via the web management interface. This affects the availability of network connectivity for small offices or remote sites relying on this router, potentially disrupting business operations. While no active exploitation has been confirmed, a public proof-of-concept reference exists, so proactive mitigation is warranted to prevent service interruptions.

Business Impact: Medium

Compensating Controls

Restrict web management interface access to trusted networks, disable remote management, segment affected devices, and monitor for anomalous requests to the formEasySetTimezone endpoint.

Threat Intelligence Overview

EPSS Score

0.4%

Top 69% exploitable

Prevalence

Low

Specific consumer home-router model, end-of-life, limited enterprise footprint

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.4%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Stack-based Buffer Overflow HIGH

A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold.