CVE-2023-36356 — TP-Link TL-WR940N V2/V4/V6, TL-WR841N V8, TL-WR941ND V5, and TL-WR740N V1/V2 wer

TP-Link TL-WR940N V2/V4/V6, TL-WR841N V8, TL-WR941ND V5, and TL-WR740N V1/V2 were discovered to contain a buffer read out-of-bounds via the component /userRpm/VirtualServerRpm. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted GET request.

01What is this vulnerability?

TP-Link TL-WR940N V2/V4/V6, TL-WR841N V8, TL-WR941ND V5, and TL-WR740N V1/V2 were discovered to contain a buffer read out-of-bounds via the component /userRpm/VirtualServerRpm. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted GET request.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-06-22T00:00:00.000Z
• Last modified: 2024-12-02T18:41:14.566Z

09References

• github.com — https://github.com/a101e-IoTvul/iotvul/blob/main/tp-link/4/TL-WR941ND_TL-WR940N_…