# CVE-2026-82770: Contec RP-WAH-SR Series buffer overflow in web service

Source: https://junglewise.ai/threats/cve-2026-82770-contec-rp-wah-sr-series-buffer-overflow-in-web-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-14. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-82770 · Severity: high · CVSS 8.8 · Published 2026-09-14

Contec RP-WAH-SR Series is a network appliance used in industrial automation environments. A remote attacker can send a specially crafted request to the web service to execute arbitrary code without authentication, potentially compromising the device and disrupting critical infrastructure operations.

Vendors: [Contec](https://junglewise.ai/threats/vendors/contec).

## Quick answers

**Is CVE-2026-82770 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-82770 being exploited in the wild.

**How severe is CVE-2026-82770?** High severity, with a CVSS score of 8.8, published 14 September 2026.

**Which products and versions are affected?** Contec RP-WAH-SR1 prior to 1.03; Contec RP-WAH-SR12 prior to 1.02; Contec RP-WAH-SR2 prior to 1.03; Contec RP-WAH-SR22 prior to 1.02.

**Is there a fix for CVE-2026-82770?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-82770 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-82770?** Check whether you run Contec RP-WAH-SR1, Contec RP-WAH-SR12, Contec RP-WAH-SR2 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A buffer overflow vulnerability (CWE-120) exists in the RP-WAH-SR Series web service component. The vulnerability allows a remote attacker to send a specially crafted request that causes a buffer overflow, leading to arbitrary program execution. The attack is network-accessible and requires low complexity, though the CVSS vector indicates login credentials may be required (PR:L suggests privilege level requirement). Patches are available; affected firmware versions include RP-WAH-SR1 and RP-WAH-SR2 versions prior to 1.03, and RP-WAH-SR12 and RP-WAH-SR22 versions prior to 1.02.

## Affected products

- Contec RP-WAH-SR1 prior to 1.03
- Contec RP-WAH-SR2 prior to 1.03
- Contec RP-WAH-SR12 prior to 1.02
- Contec RP-WAH-SR22 prior to 1.02

## Timeline

- 2026-09-14: disclosed: Vulnerability publicly disclosed via NVD and JVNVU#99009004

## References

- [https://jvn.jp/en/vu/JVNVU99009004/](https://jvn.jp/en/vu/JVNVU99009004/)
- [https://www.contec.com/api/downloadlogger?download=/-/media/Contec/support/security-info/2026/contec_security_fl_26091000_en.pdf](https://www.contec.com/api/downloadlogger?download=/-/media/Contec/support/security-info/2026/contec_security_fl_26091000_en.pdf)

## Related threats

- [Contec RP-WAH-SR Series cross-site scripting vulnerability](https://junglewise.ai/threats/cve-2026-82769-contec-rp-wah-sr-series-cross-site-scripting-vulnerability)