How severe is CVE-2022-26259?

CVE-2022-26259 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-26259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-26259?

CVE-2022-26259 primarily affects Xiongmaitech Nbd80x16s-kl Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-26259?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-26259 published?

CVE-2022-26259 was published on 2022-03-28 and last updated on 2026-06-17.

CVE-2022-26259

CVE-2022-26259 is a high-severity vulnerability in Xiongmaitech Nbd80x16s-kl Firmware with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Xiongmaitech Nbd80x16s-kl Firmware
Published: 2022-03-28
Last modified: 2026-06-17

Description

A buffer over flow in Xiongmai DVR devices NBD80X16S-KL, NBD80X09S-KL, NBD80X08S-KL, NBD80X09RA-KL, AHB80X04R-MH, AHB80X04R-MH-V2, AHB80X04-R-MH-V3, AHB80N16T-GS, AHB80N32F4-LME, and NBD90S0VT-QW allows attackers to cause a Denial of Service (DoS) via a crafted RSTP request.

Frequently asked questions

What is CVE-2022-26259?: A buffer over flow in Xiongmai DVR devices NBD80X16S-KL, NBD80X09S-KL, NBD80X08S-KL, NBD80X09RA-KL, AHB80X04R-MH, AHB80X04R-MH-V2, AHB80X04-R-MH-V3, AHB80N16T-GS, AHB80N32F4-LME, and NBD90S0VT-QW allows attackers to cause a Denial of Service (DoS) via a crafted RSTP request.
How severe is CVE-2022-26259?: CVE-2022-26259 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-26259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-26259?: CVE-2022-26259 primarily affects Xiongmaitech Nbd80x16s-kl Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-26259?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-26259 published?: CVE-2022-26259 was published on 2022-03-28 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:o:xiongmaitech:nbd80x16s-kl_firmware:4.03.r11.nat.dss.onvifc.20210727:*:*:*:*:*:*:*
cpe:2.3:o:xiongmaitech:nbd80x09s-kl_firmware:4.03.r11.nat.dss.onvifc.20210727:*:*:*:*:*:*:*
cpe:2.3:o:xiongmaitech:nbd80x08s-kl_firmware:4.03.r11.nat.dss.onvifc.20210727:*:*:*:*:*:*:*
cpe:2.3:o:xiongmaitech:nbd80x09ra-kl_firmware:4.03.r11.nat.dss.onvifc.20210727:*:*:*:*:*:*:*
cpe:2.3:o:xiongmaitech:ahb80x04r-mh_firmware:4.03.r11.nat.dss.onvifc.20210729:*:*:*:*:*:*:*
cpe:2.3:o:xiongmaitech:ahb80x04r-mh-v2_firmware:4.03.r11.nat.dss.onvifc.20210729:*:*:*:*:*:*:*
cpe:2.3:o:xiongmaitech:ahb80x04-r-mh-v3_firmware:4.03.r11.nat.dss.onvifc.20210729:*:*:*:*:*:*:*
cpe:2.3:o:xiongmaitech:ahb80n16t-gs_firmware:4.03.r11.7601.nat.onvifc.20211223:*:*:*:*:*:*:*
cpe:2.3:o:xiongmaitech:ahb80n32f4-lme_firmware:4.03.r11.7601.nat.onvifc.20211228:*:*:*:*:*:*:*
cpe:2.3:o:xiongmaitech:nbd90s0vt-qw_firmware:4.03.r11.713g.nat.onvifc.2021:*:*:*:*:*:*:*

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