CVE-2026-2961: A vulnerability has been found in D-Link DWR-M960 1.01.07. This affects the function sub_4196C4 of the file /boafrm/formVpnConfigSetup of the component VPN…

PriorityP274high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

3.41%

87.5th percentile

A vulnerability has been found in D-Link DWR-M960 1.01.07. This affects the function sub_4196C4 of the file /boafrm/formVpnConfigSetup of the component VPN Configuration Endpoint. The manipulation of the argument submit-url leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
d-link	dwr-m960	—	—
dlink	dwr-m960_firmware	—	—

Detection & IOCsextracted from sources · hover to see the quote

path/boafrm/formVpnConfigSetup↗

path/boafrm/VpnConfigSetup

commandsubmit-url=<payload>

snort

alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS D-Link VpnConfigSetup submit-url Parameter Buffer Overflow Attempt (CVE-2026-2961)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:22; content:"/boafrm/VpnConfigSetup"; fast_pattern; http.request_body; content:"submit-url|3d|"; pcre:"/^[^&]{100,}(?:&|$)/R"; reference:cve,2026-2961; classtype:web-application-attack; sid:2068140; rev:1; metadata:affected_product D_Link, attack_target Networking_Equipment, tls_state plaintext, created_at 2026_03_10, cve CVE_2026_2961, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_03_10, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)

→Look for HTTP POST requests to /boafrm/formVpnConfigSetup (NVD) or /boafrm/VpnConfigSetup (Snort rule) targeting the D-Link DWR-M960 VPN Configuration Endpoint. ↗
→The overflow is triggered via the `submit-url` POST body parameter. Flag requests where the value of `submit-url` (URL-encoded as `submit-url=`) exceeds 100 characters before the next `&` or end of body.
→The URI path in the Snort rule has an exact byte size of 22 (`bsize:22`), matching `/boafrm/VpnConfigSetup` precisely — use this for high-fidelity URI matching.
→The attack is plaintext HTTP (not TLS), so perimeter and internal network taps/IDS sensors can inspect the full request body without decryption.
→The exploit is publicly disclosed and actively usable; treat any matching traffic as high-severity (Major) and correlate with MITRE T1190 (Exploit Public-Facing Application). ↗

·The Snort rule's URI `bsize:22` constraint is exact-length matched to `/boafrm/VpnConfigSetup`. If the device serves the endpoint under a different path length (e.g., with query strings or path prefixes), the rule will not fire — supplement with a broader URI content match.
·The overflow threshold in the PCRE (`[^&]{100,}`) is a detection heuristic, not the exact buffer boundary. The actual stack buffer size in `sub_4196C4` on firmware 1.01.07 may differ; tune the threshold after binary analysis to reduce false negatives.

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvdv4.07.4HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvdv2.09.0CRITICALAV:N/AC:L/Au:S/C:C/I:C/A:C

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.