CVE-2026-5979Public exploitNetwork attack vector

Authenticated memory corruption via unbounded curTime formatting

Published Apr 9, 2026 · Updated Apr 9, 2026

Buffer overflow in D-Link DIR-605L 2.13B01 allows remote authenticated users to corrupt memory through a crafted POST request. The formVirtualServ handler passes the attacker-controlled curTime parameter to sprintf without bounding the write into its destination buffer. Low-privilege access to the management endpoint is required; successful exploitation can crash the handler or corrupt process memory.

CVSS severity8.8
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in D-Link DIR-605L 2.13B01 allows remote authenticated users to corrupt memory through a crafted POST request. The formVirtualServ handler passes the attacker-controlled curTime parameter to sprintf without bounding the write into its destination buffer. Low-privilege access to the management endpoint is required; successful exploitation can crash the handler or corrupt process memory.

The record

CVE
CVE-2026-5979
Published
Apr 9, 2026
Updated
Apr 9, 2026
Vendor
D-Link
Product
DIR-605L
Classifications
CWE-119, CWE-120, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2026Record 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=2.13B01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DIR-605Lversion=2.13B01

Published CVSS scores

8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.4VulDBCVSS: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
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1210Exploitation of Remote Services

Public exploit references

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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